I wish I could leave less than 1 star. I sent them my perfect condition textbook (that I originally bought from my university) and they claimed that my book was "counterfeit" and that they could not pay me for it but also could not send it back to me because it's "against their policy". Even after providing proof of purchase from the bookstore they still would not pay for or return my book. DO NOT SEND THEM YOUR BOOKS THEY ARE CROOKS AND THEIR "POLICY" IS STEALING FROM COLLEGE STUDENTS! WHAT A SCAM!
Megan, I am so sorry for this experience. We have a system we go by to determine whether a book is counterfeit or not, and if a book follows under those guidelines, we have an obligation to the publisher not to allow the book to continue in circulation. We have this stated on our website that it is a possibility.