Only a few copies of the 115 year old Zimmer’s Baseball Game are known to exist. Some dude found a mint copy in the storage space in a servant’s bedroom.

The owner is currently resisting  a likely high auction price (similar games have sold for $27,000) and a museum entreaty for the game.

[youtube=http://www.youtube.com/watch?v=ShBrK3wWRWY&feature=user]

(source)