We tried to sell a mobile phone, and always got it sold to someone who wanted it shipped to Nigeria, which seems to be the scam country of choice! Usually the actual buyer (allegedly) lived in the UK, but we had various stories - send to my friend who is a missionary in Nigeria, for example.
there was also a rumour that the scam merchants were able to withdraw the paypal payment after the item had been shipped, but we never got involved to this extent.
We also had a case of money transfer type agreement where an email was received from a company purporting to be holding money in payment for the goods. You were supposed to get a reference number and then post the item, before receiving the payment, and get another ref number. The premis was that in order to protect the buyer, this company held the funds until proof of postage was forwarded to them! The Post Office had never heard of such a scheme.
It can be a bit of a nightmare [smiley=sad.gif]