CKY Books is a total scam. I listened to the reviews and sent a brand new textbook to them. They quoted me $20, even though that price was very low for it's going price. I had to pay for my own shipping label because C. Allen wouldn't generate one for me - which their service says they provide. I paid $5.60 to have the book sent. I received an email stating they received my book, processed it, and it's in good condition, and passes their "condition requirements." So tell me why C. Allen now says they're only paying $10 for the book? When I asked C. Allen for my book to be sent back to be, he was incredibly rude. He is the epitome of "terrible customer service" - and for a business to have someone like this in their ranks? *Shake my head.* C. Allen told me he would only send my book back if I paid him $15 plus tax (Tax for what!?). Then he threatened me in an EMAIL - written proof. He also stated he would not pay me and he would not send my book back to me. Terrible customer service! Scam business!