According to Retrothing.com, some Atari lover paid $31,600 for Air Raid, a very rare Atari 2600 game. Said to be the only original box known to exist, and only one of 20 cartridges, it has proven to be a hot commodity amongst eBay buyers. After ending on April 10th, 2010, the game sold for $31,600 and has been deemed the most expensive video game cartridge ever. This may prove to be a troublesome transaction, however, as the final prices has exceeded PayPal limits, forcing the buyer and seller to find another means of payment.

Source: RetroThing