As a person who tried this route last year...don't do it.
I ordered six books I needed. Four of them arrived and was a great transaction. The other two was a mess. I got one back that was the wrong edition. The website and description clearly stated it was the version I wanted. The other one was in Spanish and there was nothing in the site or description to make me believe it was Spanish. Also, the book was in shambles where the description said, "slightly worn."
There was about 10 days until I went back up to school and I e-mailed the two defective books that they weren't what I ordered and I want my money back. I even offered to send back the shit books to them at no additional cost to them. No e-mail reply. With no time, I complained to Amazon and a couple days later, I got a profanity laden e-mail who sold me the Spanish book about how "fuckers like me" are ruining Amazon. I was credited my money. I asked if they wanted the book back, to which I was given a blunt reply, 'Fuck off.' How nice.
The other book wasn't like that but it was a pain in the ass. Long story short, I got my money back after about 6 weeks of BS. The seller tried to postpone it as much as possible and after threatening to contact Amazon again, I got my money back but he demanded he get back his book right away. I did and that was that.
Which is funny because I must have made about 200+ online transactions via Amazon and the books were the only two to give me problems.