I highly suggest http://half.com http://half.com I've sold many books using it. I usually don't buy textbooks unless I have to. My university library provide

I highly suggest http://half.com http://half.com I've sold many books using it. I usually don't buy textbooks unless I have to. My university library provides course reserved textbook rentals for free so anytime I need a book I just go to the library and study.