michiganfan2 currently has a thread on the NintendoAge Forums for an auction for six Nintendo NES test cartridges. Included are the Power Pad Test Cartridge, NTF2 Test Cartridge, Port Test Cartridge, Joystick Test Cartridge, Control Deck Test Cartridge and everyone’s favorite, the Zelda Test Cartridge.
He’s looking for an opening bid of $1400, and plans to send them individually to eBay if no one bites.