I would have to say probably my sealed Super Mario 64 in absolute mint condition, gotta get it graded, if it comes in high enough I may be a millionaire ;) lol, also have all the Pokémon games sealed and most graded so they may be higher depending on the grade I guess, also have a sealed 1st edition fossil Pokémon booster box which runs about 20k usually.
So probably one of those!







