I had the same thing happen when I won some very expensive watch bracelets on the 'Bay. It was the seller's first transaction and it gave me some small bit of security, but it sure made the seller unhappy. As soon as the parts arrived I looked them over, posted positive feedback, and he got his cash.
The seller's first reaction was that I was scamming him... I told Paypal that I didn't appreciate the poor aspersions it cast upon me in the seller's eyes.