I made it out to Portland Retro Gaming Expo this year! Really cool event, and tons of stuff I would have loved to buy if I had infinite money. I spent more than I intended to but I'm happy with my pickups. All are CIB.
Sonic the Hedgehog 2 - Game Gear
Chrono Cross - PS
Overcooked! 2 - Switch (this one was a gift from my girlfriend, not a PRGE find)
NES:
Ice Hockey
Excitebike
Super C
Bubble Bobble (even has the cart bag)
R.C. Pro-Am
Pokemon Colosseum - GC
Pokemon Colosseum Bonus Disc - GC (Apparently this was given as a pre-order bonus for Pokemon Colosseum, I'm not sure if it was available any other way. This is supposedly the only legitimate way to get Jirachi in 3rd gen Pokemon games.)
Custom Robo - GC
Fortune Street - Wii (this one is pretty hard to find, I had never seen it in the wild until PRGE)
Xenoblade Chronicles - Wii (possibly the GS reprint)
Sonic Colors - Wii