One small hiccup that I could see happening here is when the exchange is done back into paypal. the buyer might lose money pending what the exchange rate was back then vs what it is now. With that said, the guy has been yanking on the chain for way too long. You are in the right as the seller to find other perspective buyers and give the guy his refund (even if he loses on the exchange rate). Too bad. I drove 14hrs in one day to go from Ottawa to Boston and back...he had 4 months.