Ultimate 11 [Neo Geo] – Price: $10,000

Super Sidekicks 4: Ultimate 11 is one of the few sports video games to become very rare. It was developed by SNK in 1996 and was the fourth title in the Super Sidekicks series. You play as one of 80 different national soccer teams and try to win the tournament.

It is unknown exactly why, but very few copies of this game were ever made for the home Neo Geo console (AES as it is known). The game very rarely comes up for sales but the last time it did the game sold for $10K.