Kindle Paperwhite
Technically was gifted to me, but I got it at least 7 years ago and it still holds up amazingly. I have to charge it a little more often, once every 2 months instead of like 2 times a year, but prob the only electronic I have that I have yet to replace.
Oh and my Ti-84+ that Ive had since hs and still works amazingly
Ebook readers are so so good.. One of my best purchases as well.. I do recommend Kobo however, as to break Amazon's monopoly. You can sideload books and even install a different OS/software. I use koreader, but there are others.