This wasn't the case for me last month, I bought a guitar pedal that turned out to be a fake, I filed the complaint and sent in evidence, received a full refund from eBay/Paypal.
Not all eBay cases have the same outcome. There are even online sites dedicated to putting together counterfeit claim documents for Chanel, Hermes, etc for eBay. They usually charge around $100 for a document.
