Who ever put the pounds in your hand first mate. Only way to do it now a days, as theres to many messers about. If the guy though ebay wanted it, he should of payed a deposit.

I did this with my car when i sold it, Guy left a deposit to hold the car till he got his loan cleared etc, I had someone else coming to view it next day, he wanted the car and had the full asking price. So i let it go, felt a bit of a c*nt as i had a deposit, but end of the day, if his loan never cleared i was left with no buyer. i jus made up some shit and gave his deposit back