Ok, so I sold this guy a phone on ebay, and the phone turned out to have a bad ESN number, which I didnt know about. I offered a full refund of his money, including shipping both ways, but he dosen't want the money sent through paypal. Paypal is the way he paid me in the first place. I'm just worried that he might be trying to screw me over by having me send him a check and keeping the cash, then giving me negative feedback saying that i never returned the cash, or opening a paypal dispute or something. What should I do?