It's not a new or original idea, but with the right hook it might just work well... I created a site like this some years ago for my school: http://shelfswap.co

It's not a new or original idea, but with the right hook it might just work well... I created a site like this some years ago for my school: http://shelfswap.com/ http://shelfswap.com/ The challenges are getting adoption at a school. We hit a lot of interesting ideas around it... 1. Obviously the best times to facilitate these transactions are between sessions with short breaks (e.g. fall to spring, vs spring to fall, separated by summer). We were on the semester system, so we only get 50% of sessions to have such a gap... vs if you were on a trimester or quarter system, you would have 66-75% sessions this way. 2. Some students (sellers) immediately saw the appeal "oh, I can get a lot more money for my books, I just have to hold them a little longer?" others did not "I don't care how much I get, I just want to get rid of them" (which is why college bookstores are able to cheat these people). The buyers were less difficult to convince. 3. There were battles at my school to get it allowed... yes we had to check, word of mouth wasn't enough, we needed to put up ads. Luckily I was already in good with our school executives, so they went to bat for me against the bookstore. 4. The bookstore was very upset about it, but I do believe we spurred them to give better prices, have better advertising, and an easier system the years following this project -- helping the consumer. I eventually walked away because my "non technical cofounder" started doing stuff behind my back, contributed very little, yet he got upset at me in my senior year not doing more work on it. Really, it's my fault. I should have known that he wasn't actually bringing any useful skills to the table ahead of time--enthusiasm isn't a skill. edit: formatting