Where can I sell my college books?

I tried to sell them back to our campus store but the store won't buy them back because they are already using the new additions for next year. Is there a website or something that will buy my used books?Where can I sell my college books?
eBay.

Craigslist

www.moneyforbooks.com

http://www.textbookx.com/

http://www.ecampus.com/

http://www.valorebooks.com/Where can I sell my college books?
http://www.bigticketdepot.com/Aff/aw.aspx?B=21%26amp;A=8154

Sell them yourself for freeWhere can I sell my college books?
I used to sell my old college books on Amazon. If you go to Amazon Marketplace you can sign up to be a seller. It wasn't difficult at all.
Usually the college bookstores have days where u can bring in old books but... yeah places like amazon and ebay are always ways to dispose of them too...