What is the rarest game you own?

[AdventWolf]

@NightDragon -
That's what I thought, some old low release PSP games already can get up to $30. Though with games moving to DD, their value will decrease.

@atma -
Lucky! I don't have any sealed games, the only game that I have that is in its box is Monopoly for the NES, mint. Good game :P.