Paperbackswap works some of the time. The problem is if someone complains about you, your account is automatically shut down and you lose your credits. You do not get a chance to share your side of the story. In my case, I ordered books that never came. The sender claims I received and read them. I was told to contact the post office to find out what happened. Before I could do any of this, my account was closed. I lost 164 book credits. I had offered to credit the sender anyway because I had enough credits. This was not good enough for them. I also lost credits on their CD and DVD sites. After years of trading, one complaint ended my account.