What item do you own that has an unexpectedly high value?

I had a free book reward from Thriftbooks, which I used for a copy of Long Dark Teatime of the Soul by Douglas Adams. When it came, I was kinda bummed that some kid had scribbled on the title page, but eh, it was free. At least it was a first edition in otherwise good condition, I won't complain.
As I was reading, I got a little itch in the back of my mind, and it of curiosity looked up his signature. Turns out, it looks like some kid's scribbling
Probably why no one realized.
So I got a signed first edition, which goes for about $200, totally free.
- WHAT. That's crazy! What a story- great find!
  
  A very Douglas Adams sort of occurrence, particularly fitting I thought.
- I used to frequent a thrift shop that gave books away for free, I saw a copy of Cloud Atlas and thought it would be a good read (it was). I accidentally for the dust cover a little then looked at the title page, signed first edition. Not worth much, but cool nonetheless.

I went to a Hotel Furniture liquidator for some new furniture. Saw a good looking office chair and they only wanted $20 for it.
Brought that bad boy home and only then did I find out that they had sold me a new Herman Miller Aeron for only $20. Completely insane.
- I've heard those chairs are super nice and super expensive. Great find!
  
  I've sat in one. It's a nice chair, but... well let's just say office chairs are very subject to diminishing returns. I'd definitely buy one for $20 though.
  
  Yeah. New they're like 900+. Used, early 300+
  
  I'm sitting in one now. It's 20 years old. It's time for a new one.
  BUT. They're repairable. The local HM dealer can tell you where to send it for an assessment. It'll not have its warranty back, but for 7,000 days of heavy use, this thing's doing well. Its back and pan are good, and it's really just a few stabilizer bits that look like they're the patented 'first thing to eventually go' struts. It could be a $200 repair and it's back in business. But I'll have a new one this year because my ass wants to see a new one.
- Nice! I just paid $300 for one of these used a month or so ago. Found out it’s a little small for my height so I’m going to have to resale and find the bigger version or just get an expensive office chair and stop trying to be cheap
- I got one as a hand-me-down from my father's office when they replaced all their chairs. It's pretty well worn and the upholstery is rather frumpy these days, but the bones of the thing are still good.
  I remember talking about desk chairs with a friend group and on a lark I thought I'd read off the model on it to demonstrate how unassuming this no-name chair I thought I had was. So I actually said something akin to, "Yeah, it's just some chair from some company called Herman Miller, whoever that is," and everyone was aghast. They had to explain to me what Herman Miller actually is, and I was very embarrassed for having accidentally humble bragged about it.
- A good chair is worth a lot of money. A good back can help you for a lifetime.

The single most expensive item I own is a gold coin from Imperial Rome, an Aureus of emperor Antoninus Pius. I bought it about three years ago when I was just starting to collect ancient coins. I came across this particular coin on a "regular" gold & silver bullion site in my neck of the woods, for 3K. Not knowing too much about it, I bit the bullet (which is actually an incredibly stupid thing to do, akin to gambling). Turns out it's very real, mint state, and worth about 2K over what I paid for it right now. I have since continued collecting ancients, especially Romans, and by now know the entire history of Rome and all its emperors in detail. Which again underscores how incredibly stupid it was to buy something so expensive without decent prior research. I was just incredibly lucky that an actual reputed bullion dealer apparantly had come across this coin and got rid of it far under what it was worth.
I don't expect to be able to repeat this feat, but I'm definitely on the lookout...
- That's awesome! I've collected a few coins but none worth that. I only have one ancient coin of the Gallic Emperor Tetricus II that's in rough condition, but I only purchased it for $10. The only surprising coin I have is an 1809 US Capped Bust Half Dollar that is apparently a rare variant with some markings along the edge, and PCGS says there are only an estimated 900 of that variant that are still around. Unfortunately, there was already a deep scratch on the front when I bought it that likely lowers the value to that of the normal variant, but I still love the history and rarity of it.

I had a friend over who complimented my teapot, I love it because it's a nice color, good size and has a stainless steel infuser that fits inside. So I offered to get her one of her own only to find out that this particular color is highly collectible and worth 6-7x what I paid for it originally. Now I have a nice teapot I'm paranoid about anything happening to, haha.
- If you never intend to sell it then value doesn't really matter. It can be a fun story when someone is over for tea, but you aren't losing anything if something happens.
  
  It does matter if I ever needed to replace it 😬 I know I'd order some other teapot instead but I do love this one and I'd miss it.
- What color is the teapot? Do you know if that color had a limited number or if it is just popular? It's always a little funny to me when something is rare just because of a different color or something similar that doesn't impact function compared to the normal item, but I get it all comes down to preference and rarity.
  
  It's by Le Creuset, and they apparently rotate out most of their colors. So you can still buy the same teapot in a different color, which is what I ended up doing for my friend. The one I got was a limited run, it's a pretty rich purple they called "cassis", if you search Ebay for anything in that color the prices are nuts!

My son has a stuffed animal in his bedroom worth about $5,000
He won a sweepstakes prize while we were collecting squishmallow cards. I built him a plexiglass cube to display it, but if not for the display, it's a very unassuming stuffed animal.
- That's awesome! I agree that it doesn't look all too special if it was just sitting with other stuffed animals.
- I have a feeling these are gonna go the way of beanie babies and vinyl toys and be worth very little in 3-5 years.
  But then again, I just dug out some of my old Matchbox cars for my 6 year old. Just for fun went looking on eBay, and if I had treated them better, a couple were worth over $300. So who knows.
  
  That's fine, I don't think he'll ever sell it. It means more to him than a pay day.

I have an old folder of pokemon cards from my childhood. Apparently, that folder is worth thousands. I have first editions of a lot of the first cards and they are all in near mint condition. Im not selling, as they have sentimental value + my local shops would probably rip me off.
- I wish I had kept my cards. I had binders and lunch tins full of Pokemon cards when I was younger. A lot got sold at garage sales while I was growing up, but I may still have a few left somewhere.
  If you ever do sell them, I'd recommend only selling to a shop as a last resort or if you need quick money. I usually start by trying to sell on Facebook Marketplace since you don't have to pay fees or shipping and get the most profit. On the flip side, you usually need to wait longer due to the smaller number of local buyers, and you have to deal with annoyances like people haggling for obscenely low prices, asking you to drive far to meet them, or just not showing up to buy the item. After a while, I usually list the item on eBay which means less profit due to fees and shipping, but usually more buyers and a smoother experience.
  
  Thanks! That's too bad, it's actually a fun game to play. I was one of the only ones in my neighborhood that played the game when I was a kid. So lots of dups and such.

I have four tyres in pretty good condition on my car, that's $1000 right there.

A spectrophotometer - the sort used for display calibration and color sample matching. I paid about $180, which was extremely low; the current version from the same company is ten times that new. Colorimeters, which look similar and can also be used for display calibration cost far less.
I mainly use it for flashlight reviews.
- What is the model of spectrophotometer that you bought?
  
  X-Rite i1Pro.
- That's a neat item, and I never really considered what work would occur for reviews like yours. Was your spectrophotometer a great deal when you bought it, or has it just risen a ton in value?
  
  It was an unusually cheap price on ebay.

I found a copy of “The Hunt for Red October “ in a bargain bin. It looked funny and had a version of the cover I’d never seen before Bought it for like $5
It was a first printing From the Naval Institute Press.
Worth like 200$.
Nice
- I'm actually reading through Hunt for Red October now, but mine is a cheap worn-out copy I got for free with another book purchase at a flea market. That's awesome to find a first edition!

I discovered that a small strip of dead land at the side of my friends’ brand new house was available to buy for loose change from the original land owner (a once giant estate that had been broken up into parcels at auction) Fast forward three years or so later and the developer started stage two of the house building, another 850 houses. Guess whose tiny parcel of land was needed for utilities and access due to the terrain? We basically picked a number out of the air and the next day the cheque / check arrived. Paid off the mortgage, sold the house and paid about 90% the price of their dream home straight away and had a bit left over too. Can’t help but think that somebody somewhere lost their job/contract over that.

I own a full size Batmobile model from a canceled game bundle Batman Arkham Knight: Batmobile Edition. It was canceled due to quality control issue and was shipped to select people before getting canceled. So that's a pretty rare find. All the electronics still works and it can switch normal and battle modes with a remote. Had some people offering multiple thousand bucks for it, and I got it just randomly without knowing it's rare.
- What does full size mean can you get inside it and drive it around
  
  It's about 30 cm in width. By full size I meant it's not a hot wheels model

Great grandpa was a woodworker, there's been at least one in every generation, and some how got a hold of a late 1800s or early 1900s Stanley No.1 plane. I think it sells for around 2k to 2500. Its got wear, but it still works just fine.
I rarely use it, but it's something that's been in the family for over 100 years. I do a little woodworking, mostly utilitarian stuff like boxes and shelves, but I'll never sell it. 3 generations of people used it to make a living.
- I agree something like that shouldn't be given up. It's amazing that it's made its way to you and still works. While they don't take up nearly as much space as your plane does, I have a deed, some bank statements, and some letters from relatives that are 100-150 years old. They wouldn't be worth much to anyone but my family, but it's great having that history to hold onto.
  
  A number 1 plane is actually tiny. That's part of why they are expensive. They are small enough that demand was low since most people didn't want/need them. They only really fit in child hands.
  Now they are a collectors item since people want to collect them all, but they never made many.
- It's* got wear

A bit of a narrow audience, but I bought The id Anthology - basically a greatest hits collection of id Software's games up to Quake.
I bought it for a laugh really a few months after it came out for about £25, and kept the cool trinkets inside it.
These days, it's worth anything from fifteen times that to fifty times that, judging by eBay's completed listings.
It's cool, and I've no plans to flog it, but it's nice to know that there's a small holiday's worth of funds tied up in it.
- That looks awesome! Collector's boxes of games can be really cool. I still have the collector's edition of Skyrim (the original release), and it's worth a good bit. I don't really want to get rid of the cool Alduin statue though.

I have an old book from 1932 called “The Theory of Relativity” by Albert Einstein. It smells ancient and is worth a bit of change last time I checked.

This isn't a high price, but higher than what I expected when I first thought about it. Growing up, my family had this chrome GE Bakelite toaster. Very dependable, never broke. The very definition of "they don't make 'em like they used to". I took a liking to it, so my parents gave it to me.
I started getting the history of it. My father had bought it at a garage sale in about the 1970's or 1980's. Before that, it was sold in the mid 1950's. I don't know what this one would actually go for since it's seen around 70 years of constant use, but similar toasters on eBay are going for $25-$70. Not bad, considering that people can't even give away many newer toasters.
- That's really cool. Such a non-descript item that still holds some value all these years later.
  
  I'm honestly not that surprised. It has a cool vintage look because it's, well, vintage.

Oh, I always win at Book Off in Japan. If you don't know what that is, give it a search. It's an interesting place.
I've bought several expensive camera lenses for 8-20$. Since they have no electronic components, they work fine. I use them to document work I do for various people or myself as a marketing too for my business. Worth every last one of those 8 dollars! Some are worth quite a bit of money.
There's a vacuum tube on my desk worth a bit. I found it for 3$ in a junk bin. Turned out it worked, so I built a weird, cursed amplifier out of it as a joke, using some old Soviet scrap and mystery Chinese ICs. Probably not worth anything anymore! -- but hey, it's a tube amp that works entirely at 5V! So weird!
I have a beautiful set of unused old ink stones from a famous manufacturer in China. I paid around 10$ for it. These are actually quite expensive and worth hundreds of dollars. Certainly less than a thousand though.
I also have a singing bowl, made of cast bronze. I don't know much about it, except it's old enough to predate modern machining (it was clearly sand-cast). It's probably also cursed -- someone sold it to me by accident for a few dollars when I asked for something else. Then I didn't notice until I got home. It's probably worth some money to the right person, but few people value such old things in my country and I don't want to sell it to an overseas buyer.
Oh and I have one of the original victory fliers from when the Japanese defeated the Russians in 1904. In perfect condition. I have no idea what it's worth, but certainly much more than I paid for it, haha. I should probably find a museum for it one day.

I built a cube(a curated collection of cards made for drafting) of all the worst Magic cards ever made.
Most of the cards are worth around $0.05, however my copy of Urza's Miter currently goes for $22 because of it's rarity
- That card is such a a potato lol. I'm very amused it's got a price range that high
- That's an interesting collection of going for the worst cards, but it doesn't surprise me with some cards being worth more. I collect some coins, and I know some people will pay high sums of money for a coin with a low official grading (the coin is naturally worn down to the point you can barely make out what type of coin it actually is).

One Christmas, my mother-in-law gave me an unopened bottle of whisky they had in their cabinet for a while. It was some of the best whisky I've ever had. About halfway through the bottle on Boxing Day, I took a moment to look up the cost (it's since gone up in price, but you'll get the idea)
https://dekanta.com/store/suntory-hibiki-30-years-old/
I. Was. Horrified. I have exactly two ounces left, that I will probably consume with my wife on my deathbed.
- Bruhhhh
  
  Don't downvote this guy, 'bruhhhh' is right.
- Ok but you said "some of", not "the" best, I wanna know which whiskey you've had that's better than the $12,000 bottle!
  
  Uncle Jethrow’s bathtub special is surprisingly smooth and you don’t even go blind with this batch.

I bought a mosin nagant made in the 30s with a hex receiver for $80 when I was 18. They are getting closer to $1000 now. I should have bought more. The place had a whole crate of them.

I don't own them anymore, but vintage Hewlett-Packard calculators, the RPN variety for engineers. An acquaintance moved into hospice a few years ago, and his family cleared out the house. I went over because they offered us sailors pick of his old boat gear, but I poked through the pile of electronics destined for the recycler, too. I grabbed several old calculators, a printer unit, and some programming books for them, as I was vaguely aware that maybe some people collect them. As it turns out, I got almost $700 for them on eBay.
The ones that I do still own are several IBM Model M keyboards that I picked out of the $1 keyboard bin at the university surplus shop back in the day. Although, after using one of them for 17 years (with no signs of wear), I realized that 5 spares would long outlast me, I sold a few for almost $400 total.
Another friend unexpectedly passed away earlier this year. A neighbor is helping to liquidate his vintage computer collection. I stopped by the house and saw a Northgate OmniKey Ultra in a pile, and asked how much would he take for it. Turns out, that was a recycling pile, so he just gave it to me. I could probably get $200 for it after cleaning it up, if I didn't need it.
- Seething with jealousy I am. I love the HP 33s but it’s currently priced more than I’d like. I don’t know if I’d actually use it, not a ton to use it on anymore, but wish I had one nonetheless.

I have a hideous lamp that I hate that’s worth about a grand. It doesn’t look like it’s worth that much, just a heavy brass base and reverse painted landscape shade.. but all antique and sought after.
My cats are probably going to break it so I should sell it but it was the last lamp my mom refurbished before she died (why it didn’t get sold and I got it in the first place)
I also have a brass fairy floor lamp that, with no shade, is worth about $1500, but that one looks valuable, and is very rare (and super cool)

Nintendo DS Pokemon Soulsilver with the Pokewalker. Worth a few hundred.
- It's so strange to see those cartages worth so much. But good on you.
- I walked into a used game store a year or two ago and saw the price of older Pokemon games and cried a little on the inside. I had a lot of the older games when I was younger that I sold to buy new games. I had Red as the earliest and stopped playing Pokemon after Diamond, so quite a few of the games in that timeframe. I unfortunately sold them before those games had such high price tags, but I never would have anticipated that when I sold them.
  
  Yes, Pokémon games, some Lego sets, and a few random niche books have all gone up in value in ways I couldn’t have predicted.
  
  If you ever go to Japan save up some good money for collectibles. They're sold at VERY reasonable prices and because it's Japan and people take care of their shit they're in very good conditions a lot of the time. You'll want to buy a lot of your childhood stuff, I know I did. I had to buy an extra checked luggage just for all the stuff I brought back and I only traveled with my carry on because I wasn't expecting to buy anything except for a game cube which I could fit. Turns out I was wrong.
  
  TIL I have like $300 of Pokemon games sitting ony shelf. I still play them sometimes on my childhood Gameboy
- Not worth near what yours is, but I have red, blue, silver, firered, platinum, sun and moon as well as several on the switch. I'd like to collect them all but it would be very expensive
  
  Visited Japan last year and picked up all the originals in Japanese. Red, blue, green, yellow, crystal, gold and silver. Solid condition and working for a decent price at an out of the way recommended shop. I would like to pick up the boxes but they would probably be more expensive because of the rarity. I'll probably end up buying some aftermarket on Etsy just to display them.

My student loans? Child support? Repairs and maintenance?
laughcries in poor
- I pay 1000 dollars a month for what amounts to a decrepid dog kennel.

I have a pair of front seats for a car.
Got them in trade on some work, was just so I could replace worn out seats, but when I got them I noticed they were special option seats, only came factory in one car in Japan, and an option in ~7 various cars/years in Japan. They're worth ~$3000. For 2, unassuming blue and black seats.

Geese. We got them to cut down on the number of chickens that hawks were taking. They live exclusively on grass so they cost nothing to maintain. We haven't lost a single hen to hawks in the three years since we got them.
So that's all about saving money. Where is the profit? Goose eggs. In the spring they lay eggs that are 5.5 to 7.5 ounces each. Chicken eggs are only 30% yolk. But goose eggs are 50% yolk. A single egg has a yolk almost 3x the size of three chicken eggs. These are worth money as food at $7 each or as hatching eggs for barter with other homesteaders that want geese and have incubators.
Edit: forgot to add that they are the best lawnmowers ever. They have dramatically cut down how much we need to mow. Which saves fuel and W&T on the mower as well as time.

I have a copy of X-Men #4 (first appearance of Juggernaut) signed by Stan Lee.
I also have a few highly sought-after lego sets. :)
- I have a limited edition cell from the Justice League animated series signed by Bruce Timm. Got it about 15 years ago for about $900AUD, it's worth about $2000AUD now.
  https://www.animationartgallery.com/product-p/wblcc1212.htm (plus I got it shipped with a proper frame and UV perspex etc.)
  
  That's rad!
  My best DC acquisition was a Batman Adventures #12 (9.2 grade).

I own a Zune. Despite owning it for over a decade, it's still worth about what I paid for it.

Not sure if these would be unexpectedly high values as most people know they fetch a little bit, but I have all my old N64 games still boxed with most of the original inserts too. The one I know most would be Conkers Bad Fur Day, that always seems to fetch a nice price.
A couple of my Funko Pop figures are possibly worth a few hundred but nothing more.
And I have the full set of Hobbit and Lord of the Rings Lego sets which I know go for a bit over the original price.
- All cool collections! I have a few Funkos worth around $100 but probably wouldn't sell them unless I needed to. Besides the LEGO Bilbo I mentioned in the description, I bought the Rivendell set towards the end of last year. I would like some of the old LotR or Hobbit sets, but they get pretty pricey.
- N64 games are pricey enough, but with the cardboard? Might as well consider them an investment! Lol

I have a few Gamecube games that people sell up to two hundred dollars. However, I take caution because supply is not demand.
- It's always cool to have some older games. I kept a few of my Xbox 360 games even though I probably won't play them again. I know someone that also has a collection of expensive PC games from the 90s and early 00s, and they're always cool to look at.
  
  If any of the old PC games are MMORPG's, they don't have to collect dust. I know first-hand many are still populated with players.

10 years ago or something I bought a collection album from an artist I liked. I just did it because I like collecting CDs and I liked his music, but it turns out that it was a limited edition and only 1000 were made, each one had a unique number on it. I've seen them go for a few hundred on discogs a few times. I don't intend to sell mine though, it's in a pretty used state because I didn't really realize the value. I'd also rather have it than have a few hundred euro's.

According to pricecharting.com my video game collection is worth in the neighborhood of $20k. Now, this is kind of bullshit for a few reasons, many of which come down to "just because it says the games are worth that much doesn't mean you could actually get that much by selling them." And I have no intention of selling anyway...i use pricecharting to track what I have, not for the supposed value. But it's surprising to see such a high number considering there's not a ton in my collection in terms of super rare stuff...the highest value things I own are ~$200.

I have some rare coin collection that I inherited. When my great uncle passed away he just asked everyone to be fair when they go through his stuff. I told everyone they could go ahead I wasn't too worried about getting anything of his as he didn't really keep much sentimental stuff. My mom put a few things aside in a box that she thought I'd like. When I finally had time to go through everything I noticed a binder that looked rough and weighted a ton. Sifting through it I didn't see much reason to keep it but to be safe I decided I'd go talk with my neighbor who owns a pawn shop and knows more about coins than I do. Come to find out I have 2 VERY limited coins that were nearly perfect for their time. Something about them predating US currency. Total value of all the coins is anywhere between $50k-100k. Selling them takes a life time though.

The Super Super Happy Face on ROBLOX. I randomly decided to buy it when it went on sale, and now it's worth insane amounts of Robux.
- Nowhere near as valuable, but I copped the black, white, and azure pinstriped fedoras back in middle school and they’ve definitely ballooned in price. Had to turn off trade requests cause any time I’d log on, my messages would be filled with them
  Always wanted some of the sparkletime ones, but they were way too expensive even at that time
- That's awesome that you got it before it ballooned in price. The cost of digital items is kinda crazy to me, but I know they make people happy to own, so who am I to complain? I can't recall, can you convert Robux into real currency, or can it only be used on other Roblox items?
  
  Yeah, but the exchange rate is almost 400 for a single dollar. Basically only worth utilizing if you’re a creator getting consistent income from place visits

Not me but my mom. Her great grandmother gave her her "mad money" stash that she'd saved over the years, all in silver dollars. She didn't think much of it, just kept it as a memento.
Turns out it's 300 silver dollars minted between 1900 and 1905; some of them are worth over $1k by themselves.

I buy and sell used books. I came across one nondescript worn hardback in a box and for some reason decided to research it. It's worth five figures. Cost about 25c.
- Okay. What is it?
- Tell us the details
  Was it very old? Signed? Good condition?
  
  Moderate condition, ex-library so there are stamps and labels. However it's about 120 years old and a first edition. There was one for sale last year, now there are none for sale anywhere in the world, AFAIK. It was the first book of its genre and is recognised as influencing the later masters. Think Poe influencing Conan Doyle. I'm reluctant to mention the details because I don't want it showing up in a search. Sorry to be so cagey! I'd be annoyed by this post myself if I read it.

My two most valuable records are the Katamari Damacy vinyl from Fangamer & the Sonic Adventure 2 vinyl from Brave Wave. I got both for $40 at different conventions and they've never been re-pressed so they both go for $250 sometimes, even used.

The most valuable thing I own is my pokemon card collection. I was obsessed when I was kid, but unlike everyone, I kept going through Rocket, Gym heroes and challenge, all the way to Neo Destiny and Legendary Collection. Possibly the rarest cards I have are two 1ed foil discovery Tyranitars and one 1ed foil Blaine's Charizard. My cards are very well loved and things have calmed down since the pandemic, but it was very weird, especially considering I got a booster box of Neo Discover for 50 bucks in 2009

I have quite an extensive book collection between my wife and I who are both avid readers, turns out due to limited printings even unassuming non-“collector” books appreciate quite well. I have several books purchased for 20-30$ that are now worth hundreds if I wanted to part with them since the company just didn’t print many and doesn’t do reprints.
- I also have a decently sized book collection, but none that have gone up in value like that. Do you collect any specific types of books, or just whatever you think looks interesting?
- I switched to ebooks a long time ago, but had quite a collection prior to that, and was also the recipient of goodies from my mom's massive science fiction book collection, including a first edition Dune (Chilton, 1965). My favorites are my signed Terry Pratchett and Douglas Adams books, though.
  None of them are going anywhere.

I have a Lego ninjago mask that's worth like $80 with both parts of it. I didn't know how expensive it was until checking my collection a couple days ago.

Outside of a few comics, one of the unexpected items I have is Lego Wall-E. Even unboxed, it goes for several hundred. Don't underestimate retired sets.
- That's a cool set! I am currently trying to sell a few retired sets (mostly Star Wars, Indiana Jones, and Bionicle) and some surprise me in value. A few are about the price they originally cost, while others have tripled in value.

I own a Planet Arlia Vegeta Funko Pop. Currently worth approximately $5000 USD.
- Because my wife liked it and wanted one. We got it many, many, many years ago before it cost that much. I think it was around $100 when I bought it. I had just got a new job that was paying me way more than I was being paid before, and it was her birthday, and she had been talking about how much she wanted one for years. I figured if $100 makes her happy, why not? It wasn't until shortly after that that the price started skyrocketing, and hasn't really stopped since.

I have an autograph of Jeremy Bulloch as Boba Fett I got when I was like 6. Still framed in my bedroom.
- That's cool! Boba Fett was one of my favorite characters when I was younger. Our family friends have a Christmas card signed by George Lucas that they display around the holidays each year. One of their family members was a makeup artist that worked on Episode 3 I think and got them the card.

The 10th anniversary Sonic the hedgehog crystal cube. Bought it on a whim back then, honestly don't even remember what website I got it on, and when I got it I pretty much just kept it in the closet because I never wanted to put it out because I figured one of my cats would knock the damn thing over.
It was actually only a few months ago that I was talking about it when Sonic the hedgehog came up and I decided to Google it and I found out they only made 500 of the fucker.

My pocket knife costs 200€ but you wouldn't be able to tell by looking at it. Obviously it's not that valuable anymore especially now that it has my name and the purchase date engraved on it.
- That's a nice looking pocket knife. I wouldn't have guessed $200, but it does look like a quality item.
  
  Its a knife
- Benchmade is worth it…

I have a Halo 4 gold Master Chief Funko that was exclusive to Blockbuster. My favorite thing about it is that it was before Funko switched to their current style. They used to have details and were cool.
- I've seen that before! I got a Halo 3 Master Chief Funko bobblehead from my local Blockbuster when they were closing. He is sitting on my desk next to my gaming PC right now with my Atlas and P-Body Funko Pops from Portal 2. My Master Chief has gone up in price, but not nearly as expensive as yours seems to be.
  
  That's nice!
  I actually discovered mine when I was moving. Still boxed up and everything. I forgot I even had it. Now it is sitting on my bookshelf.

I have a game boy game that was worth over $30 (which was fairly high for a game boy game at the time). AVGN made a video on the game and it shot up in price more than tenfold. Though it may have cooled down since I last checked.
- That's cool. I wish I had kept some of my old Gameboy games, either to play or to sell. A lot of the games I had have jumped in price in recent years.
  
  Especially Pokemon games! And especially if you kept any of the cardboard!

My copy of Iron Dragon by Mayfair would go for 225 on ebay. It's probably almost at the price point where they'll reprint it... which would be wonderful because it's probably the best Mayfair railgame and I'd love to see it surge in popularity.
- I've never heard of it, but it looks cool. I'll need to take a look into it.
  
  It's fun! There are several other entries in the series that are more reasonably priced like India Rails and Australia Rails... it's one of the few board games that involves crayon as a key component.

I have season tickets for the Raiders. I had them in Oakland, and we got 1st priority when they moved to Vegas. I jumped at the opportunity bc I knew by Mark Davis moving the team to a tourist destination that there would be demand from both fan bases at every game. My theory is that the extra demand would allow me to sell most games for profit, and I could go to 1-2 /year fully paid with the profit. So far that's worked swimmingly well. I paid the PSL off in year 1 with the profit, and now make ~$3-5k / year selling tickets.
The PSL ran me about $4500/seat and I got 2 seats. They are selling at $30k apiece rn. It's very tempting to sell them for profit, but I enjoy having the ability to go to a few games and making a bit of profit selling the rest.
Yes, I realize I'm a scalper. Yes, I realize I'm part of the reason our home games have so many away fans. Having said that, I really don't care. Mark Davis made a business decision to move the team out of Oakland where we had die hard fans like myself going every week to instead moving to a tourist trap 10 hours away. In turn, I made a business decision to profit from that move.

I picked up a used Bucky O Hare NES cartridge for $8 back around 2000. Had no idea what the game was, but the picture on the cartridge was ridiculous. Now it sells for $150-$200 on eBay. More like $600 if you have the box and manual.
Also have Sparkster for Sega Genesis including the box and manual which sells for around $400.
I have a handful of games like that. They were either bought new when I was a kid in the 90s or I bought them cheap in the 2000s. I might sell them when I'm 80.

I've got a game in a pile of about 100 sandwiched in between some penny priced games that is worth $500. I'm not creating a shrine for it. Just putting in with the rest of the group.

I collected Marvel cards back in the 90s and I'm pretty sure I have at least a few that are official "collectors items" now. I've never looked into it very thoroughly since I just kept them in baseball card pages with no other particular protection from the climate, etc, but who knows?
- I have some football cards at my parents house that are in the same boat. Maybe take a look through them to try to estimate prices and protect the expensive ones. IDK about Marvel cards, but I know there are apps for some other trading cards where you can just scan a picture of the card and get an estimated price based on recent sales.

Just recently got what I think is an RCA RS2767IF 300W after looking it up just now. Walmart has it listed out of stock for ~$150. Now, mine isn't anywhere near new condition considering it can't read CDs in the 5 CD changer and has some other cosmetic issues, but for $14.99 at a thrift store, I think I got a great deal. Especially since I can plug my phone into it using aux to RCA Y adapter.

Nothing crazy relative to some cards but I didn't expect this to be worth much.