This could be something that you bought for a higher price than what most people would guess based on the item, or it could be something you bought for a normal price that has gained significant value as time has gone on.
What made me think of this question is a LEGO minifigure I got with my “The Hobbit: An Unexpected Journey” disc. It is Bilbo Baggins in a blue coat that was apparently only sold in that movie box only at Target stores. Even considering the exclusivity, I would have guessed maybe $10-20 for such a tiny piece of plastic, but there are sold listings on eBay from $80 to $225. I could possibly even get towards the higher end of that number since I still have everything in the original box in good condition. It’s not worth a ton compared to some other items people may own, but I think most people would not expect nearly that amount.
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.