Here's my situation: bought a Marc Jacobs bag off eBay from a seller with an authenticity guarantee (NEVER would have completed purchase if not for that). I get the bag and it is fake, however, it is an amazingly realistic fake, and I could see how she (and I) would be fooled. I emailed her telling her that I am questioning bag's authenticity for following reasons...and then I ask for receipts from where she bought it. Turns out it's Designers Imports (GROAN). I emailed her back telling her that they sell fakes (why are they still doing business on web????) and that regardless that it's a $1000 bag that I got for less, I paid for an authentic bag, and it's not. So far no answer to that email. I emailed her again telling her that after thinking it over, I want a refund, b/c she clearly gave an authenticity guarantee in her listing. I haven't heard from her. Now what? I would rather not have to file complaints with everyone, but I did complete my Paypal transaction with a credit card and I am wondering if I should call them and place transaction in dispute. Any advice would be appreciated. Thanks!