Hi ladies , I am going to post this really quick cause I GTG, but I have a question for you all. As some of you know, I am new at selling on eBay. So, today I have a potential buyer ask me to double her money back guarantee on authenticity. Well, I know my bag is authentic since I have the receipt and bought from the store via phone order. BUT, should I agree to the double money thing? I am afraid the buyer will try to say its fake and keep the real one I sent her and send me a fake one! HELP !