My problem with edge is just that I think $200 is totally overkill. Unless you are playing professionally I don't think paying close to half the cost of a PS5 is worth it for a controller.
That being said, back buttons are handy. What features interest you the most?
I wouldn't recommend shopping on Amazon in general, but in this case specifically, I would recommend checking Warehouse Deals for the Dualsense Edge. That's how I got mine for 40% off MSRP and it was pretty much brand new. It's honestly the best investment I've made since getting my PS5, hands down.
My only experience is with Amazon Canada, so I can't really say. I guess the selection might be different, but I doubt prices or actual item conditions would differ greatly.