Send it back, get your money and start looking for another one, leave him positive feedback for making it right and get on with life, many things happen in the uproar of an auction, at least he is willing to refund postage both ways and give you your money back, it will be up to the next guy when he lists it, as has been said in the past and will be in the future, buyer beware, is the best route to follow.

Dave