Not surprisingly, some of the less-tattered E.T. cartridges have already been bid up to $500, while other titles like Asteroids, Missile Command and Star Raiders are going for $50 (which is ironic, since they were much better games). The Historical Society plans on keeping 500 of the titles for itself and giving some to the Smithsonian and other museums. The bidding finishes November 13th, but it may auction off as many as 750 more cartridges at a later date. Meanwhile, the Microsoft documentary that resulted from the dig, Atari: Game Over, will air exclusively on the Xbox platform on November 20th. Sadly, that will be one of the last productions from MIcrosoft's now-defunct Xbox Entertainment Studios.