What's going on on ebay now? This has happened to me three times recently after being a seller for over a year and had relatively few problems.
The most recent item was a brand new item of children's clothing that was given to my son but just was not his thing. It was worth about £12 new and still had the label on - the buyer paid about £1.30 for it and my p&p costs were minimal (about £2). Anyway, 2 weeks later, she still hasn't paid and has not replied to either of my very polite and understanding emails asking if she still wants the item and can she let me know if not.
FFS.
Why go to all the trouble of bidding if you don't want it. I can understand if you get carried away in some bidding war and end up paying over the odds for something average but the item in question is BNWT and she got herself a bargain!
Rant over.