File a dispute with eBay or PayPal to get your money back. Be sure to follow their directions when it comes to how to send the bag back (if they say send it back). I wouldn't waste another minute on trying to convince the seller, by filing the dispute they'll be forced to refund your money once they (eBay/PayPal) see the bag is indeed fake. Good luck!
You may have to get a leter of authentication to verify the bag is a fake.
Follow the instructions of ebay/pp to send the back bag.If they say send it back.
Take a pic of what you are sending back, you don't want the seller to say he got back
a different bag, insure, signature & delivery confirmation.
You may ask to be reimbursed for your shipping.
ANd above all, don't let this selly bully you.. they can get "snarky"...
You can try Caroldiva. The cost depends on how fast you need the letter and how much the bag was. What brand is the bag?
No way! Why should you have to pay a restocking fee for a fake?!
Have you posted the auction in the Authenticate This Prada thread to be certain it is fake?
Escalate your dispute to a claim in paypal. You obviously don't have to accept his offer which requires you be penalized for the seller's illegal activity. Ridiculous!