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

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.

Bought a (two actually) donkey kong game & watch for some 20-30€ each, with the box (quite used) manual etc. goes for maybe 150 now.

Missed out on an old curtas for like 200-300 though 🥲 such a beautiful mechanical piece with such a history behind it, if I get rich one day I'll definitely get one.