Currently at $585 on eBay, this ultra rare Super Nintendo CD-ROM controller prototype was supposedly obtained “from a programmer who worked for a company that contracted with Sony to develop games for the SNES-CD before Nintendo canceled the project.” Auction page. Continue reading for more pictures.

Before the PlayStation, Sony and Nintendo teamed up to create a CD-ROM add-on to compete with Sega, who was experimenting with their own (destined for failure) add-on.

[via GizmodoeBay]