I had one bad experience on ebay. It was a Jackson RR model, witch was advertised as new, but it had a thin crack going out from one of the tuners. For me that was clearly not new. Fortunately, the seller did not deny that the crack was there when he still had the guitar. He said that it was there when he bought it new, and the shop said it wasn't something to worry about. I did not agree and have sent the guitar back to him, but he refused to accept it, so it came back to me after two weeks. As I have payed with Paypal I invoked buyer protection, and they asked me to provide an assessment from a guitar shop, which I did send them. They wrote that the situation was now clear to them, I should again send the guitar to the seller and after providing the DHL receipt to them I would get my money back. So a few weeks later and after some cost for sending around the guitar and an assessment I finally got my money back. That was the only time I bought a guitar on ebay and did not pick it up personally, which I normally always do. If bought several guitars online form Thomann and Musicstore, and it was all good.