Very rare Atari 2600 game, this one is SEALED
The Music Machine (for Atari 2600) - eBay (item 130341892801 end time Nov-10-09 14:56:02 PST)
The Atari 2600 Rarity List has it at 96% rarity (Ultra Rare) and worth $4,400 sealed.
The auction is currently at $3,050 with 13 bids and still over 5 days left. I wonder how high it will go.