It's amazing, but within minuts of posting a Macbook Air on Craigslist here in NYC I was flooded with emails asking for me to sell it to them at $100 higher than I was advertising if I would ship overseas. None asked to pay via a money order. They said they could use Pay-Pal. I asked all exactly where to ship the item and eventually, after much prodding, all stated Nigeria. HA! What a shocker! Of course I won't do such a thing. But how does the Pay-Pal scam work? If they send money to Pay-pal and it clears, how can they then get the money back if the item is sent via Express mail with signature confirmation? Do they claim the item was not delivered and then Pay-Pal stupidly says OK and pulls the money from my bank account? Would Pay-pal be insane enough to do that? I have tried googling about this, but all the results end up being about eBay and money orders, etc. Thanks.