Buying from Amazon is usually safe, even if it the seller incorrectly lists the item. This is because Amazon pretty much always sides with the customer. And, according to an Amazon rep I spoke to, you can return any purchase from any seller for pretty much any reason you want. This is why it is terrible to sell on Amazon, IMHO.
I sold a super mint Zeiss 50/1.4 ZE. After more than a month, the buyer contacted me saying it arrived damage. We went through a long discourse and I denied her request for return because it had been so long. Another month later (2+ months total since sale), she filed a return request saying, "The Zeiss 50mm f/1.4 ZE does not zoom"... Amazon granted her a refund - without my knowledge. (I didn't get the email because I was busy with finals week.) She got $680 and I got no guarantee of a lens return. (I was super stressed, as I was trying to figure out how to make ends meet and payoff this terrible $680 punch to my bank account. I partially traded my 5D2 and sold whatever else I could to make sure I could pay the debt.)
Fortunately the buyer did return it. But the focus ring was super stiff. It looked like she threw the metal body Zeiss against the floor or something. The metal lens hood was severely dented and there were knick marks all over the body... I couldn't sell it again in that condition and so I decided to give it to my friend for helping me with school. He was happy. But I lost my best camera and a lot of money.