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.
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.