Do you have books in good condition?
Go to http://cash4books.net/index.php?ref=84839 , type in the books' ISBN numbers and see if you can get cash for them.
All you have to do is complete the transaction online, print out a prepaid mailing label, pack the books and send them in.
In just a few days you will either receive a check in the mail or a deposit to your PayPal account.
You won't pay a cent...not even for postage!
You can find the ISBN numbers on the back of the cover or on the copyright page in the front of the book.