I bought a Calculus textbook for $36 last semester on Ebay. It was hardcover and pretty new looking. Original price of the textbook was $130. I would of saved $6 on shipping if I knew the seller attended the same college as I did. You could rent textbooks at
chegg.com . My siblings saved lots of money renting textbooks. I, personally, buy my textbooks new/used on Amazon. The college bookstore is a freakin' rip-off. My bio book cost $110 new on Amazon. This was before Amazon instituted the CA sales tax last week. At the bookstore it's $150....