Maybe people who just bought a VB, and obviously have no idea of the price of a VB game, wanted a copy of it. You’ll also notice the postage is only ~$2. That takes it to around $10, which isn’t that bad a price for a VB game.
…But then again, maybe the guy was lucky and managed to attract all the n00bies out there. Try and take note of whatever selling methods he used (auction duration & directory location, 2 line description and really bad photo :-P), and try to replicate them next time you sell a VB game. 😉