From my neighbourhood watch newsletter....
BEWARE -- MORE SCAMS
I recently took a complaint from a member of the public who brought a Rolex watch on TradeMe for $20000. He had no reason to believe that the seller was acting fraudulently as they had a good record with Trade Me from previous sales. The money was transferred by the victim who stated they would send the item. Unfortunately he received a phone call later that evening stating that the account had been hacked.
The investigation is ongoing but it looks as though the victim has lost $20,000.
Ouch!