Unfortunately there isn't much you can do. Once the same thing happened to me, and the seller lied to me and said "oh, that item is damaged sorry." I smelled BS and told him to send me it anyways even with the damage and paid him. He refunded and said no, he wants $800 for it instead of the original $200 or so. There's unfortunately nothing you can do about it except report him, but I dont think Ebay does much.
Another time, even more preposterous (and the reason why I will never buy Louis Vuitton on Ebay or anywhere else than the actual Louis Vuitton stores) is when I bid on a speedy then afterwards, I carelessly added on a sentence to an email to him asking for shipping if the bag was guaranteed to be authentic, then the seller immediately went on a tirade about how he went through the 15 identifying factors of authenticity, and refunded my payment 6 times!!! citing "incorrect payment" and then gave me a NPB strike. Some people are so shady, and it seems like a lot of people selling handbags (especially Louis Vuitton) on Ebay are really nasty people. After that, I just don't want to deal with that kind of stuff, and to me, its not worth the couple hundred dollars or something you can save per bag when you have to pay for it with this type of mental anguish.