Ebay's live help said to me when a buyer bought my item who is in the US and I stated in several places in my auction that I was only posting within Australia that "they have entered into a contract with you by buying the item and you are still obliged to sell it to them".

The reason I was on live help to begin with was that he wanted the item (which was worth $850) sent to his friend in Zimbabwe as a "gift". It was a very suspicious transaction and the person bidding only had 1 feedback from several years ago!

I was very annoyed that ebay claimed you still have to send the item regardless yet allow you in your add to state where you will send it to!

I dont know if this is one of their terms somewhere, or whether the person on live help didnt know their job, but I wont be selling on there again.