I just started using half.com because my campus buyback program is also a joke, and my friends recommended it. I put 5 books up for sale on Sunday, sold one on Monday, and one on Tuesday.... I sold one for MORE than I bought it for, and the other for the same as I bought it for. It does take a little longer to get the money, but if you don't need it within 2 weeks it's a pretty good deal.