The most valuable thing I own is my pokemon card collection. I was obsessed when I was kid, but unlike everyone, I kept going through Rocket, Gym heroes and challenge, all the way to Neo Destiny and Legendary Collection. Possibly the rarest cards I have are two 1ed foil discovery Tyranitars and one 1ed foil Blaine's Charizard. My cards are very well loved and things have calmed down since the pandemic, but it was very weird, especially considering I got a booster box of Neo Discover for 50 bucks in 2009

I have a Lego ninjago mask that's worth like $80 with both parts of it. I didn't know how expensive it was until checking my collection a couple days ago.

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.

Outside of a few comics, one of the unexpected items I have is Lego Wall-E. Even unboxed, it goes for several hundred. Don't underestimate retired sets.

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

My pocket knife costs 200€ but you wouldn't be able to tell by looking at it. Obviously it's not that valuable anymore especially now that it has my name and the purchase date engraved on it.

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.

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 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.

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

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

I collected Marvel cards back in the 90s and I'm pretty sure I have at least a few that are official "collectors items" now. I've never looked into it very thoroughly since I just kept them in baseball card pages with no other particular protection from the climate, etc, but who knows?

Just recently got what I think is an RCA RS2767IF 300W after looking it up just now. Walmart has it listed out of stock for ~$150. Now, mine isn't anywhere near new condition considering it can't read CDs in the 5 CD changer and has some other cosmetic issues, but for $14.99 at a thrift store, I think I got a great deal. Especially since I can plug my phone into it using aux to RCA Y adapter.

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.