The auction refers to this as one of a kind, but I think there were at least three of these. Two given away at PAX and one thrugh a Facebook contest. Cool custom for sure, but a little bit overpriced in my opinion.
NES Test Cart Lot – Includes Port Test cart yellow 1992 and 1990, Power Pad cart yellow 1990, Port Test cart grey 1990
Joystick Test cart grey 1990, Control Deck Test cart grey, NTF2 Test cart grey 1989.
Nintendo DSi XL Demo Video Cartridge
1994 Sonic The Hedgehog Valentines
Parappa The Rapper Figure Desk Clock
PS3 Uncharted 2 Among Thieves Blu-ray steelbook UK Limited Edition
Super Nintendo SNES Burn-in Test Cartridge
Atari 2600 Robot Tank Prototype
Bioshock Infinite “Daddy, What did you do during the Siege of Columbia” Poster
Insomniac Games Charity Auction Signed Resistance 3 Olly Moss Poster
Atari Jaguar Rapier Development System