I'm having similar problems. Put my Escort Cossie bonnet on, I always say must collect from me in Lincoln when it's big things like this, and two zero rated bidders bid on it, then it ends and I find the winning bidder lives in Devon! No contact whatsoever since, so I've had to relist it. It all costs money though, not that they care!
There's not enough protection against this, if someone wins and doesn't pay up E-BAY should send a bolt of lightening down to the users PC and fry them.

Harsh but fair I think.