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.

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 own a Planet Arlia Vegeta Funko Pop. Currently worth approximately $5000 USD.

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.

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 have an autograph of Jeremy Bulloch as Boba Fett I got when I was like 6. Still framed in my bedroom.

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’m not cool like everyone else here who got bargains or things that went up in value but for things that are more expensive than they seem to rational people, I have $6k headphones and up to $9k pens. Got them for a little under msrp (for the headphones, the cost of the pens went up).

Rational people don’t generally expect the prices of things like that to get so high, but they actually get a lot higher, I’m also not cool like the people who have those. There’s likely other things like this I can’t think of rn, but pens and headphones easily get the biggest “what’s wrong with you?” probably because they’re handheld non-jewelry

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.

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 have some old magic cards. There's a few lotus in there. I don't do much with 'em now but they were fun at the time.

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.

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