A one of a kind Nintendo Campus Challenge game from 1991 sold for $20,100.00 on eBay, yesterday. It features three games, Super Mario Bros 3, Pin-Bot, and Dr Mario and was used for a nationwide game tournament at 58 college campuses, state fairs and spring break hot spots. After the tournament the games were supposed to be destroyed. One survived the cartridge massacre. It’s believed to be the only one of its kind.