They Buy and Sell Used Textbooks through the mail and correspond through email and through their site. I received a quote from them on several books, sent the books to them with a pre paid address label. They sent confirmation of receipt. They emailed payment had been sent. I waited 30 days for payment, as they told me to wait that long before they would stop payment on the check and declare it lost. Then they tell me the check was cashed 5 days after it was sent out, emailed me a copy, it was not my signature,if you can call it a signature. on their website they state they would stop payment after 21 days. They also said if it had been cashed they would not re-issue another one, now why would they include a statement like that? Sounds crooked to me!