I've slowly been unloading some of my MH collection on Ebay. Most of my interactions have been very positive, but this last batch has had two NPB. The one contacted me and asked that I cancel the auction because she didn't want to pay the shipping. But I've just close the second, with no response from the winning bidder.
The bidder's Ebay account is 1120powers. Looking at their feedback, they have some spotty history; several sellers have given a false-positive, pointing out that they never paid after winning and did not respond to messages. I won't be leaving a false positive (since it's against the TOS), but I HIGHLY recommend that any doll seller block this bidder to avoid a potential NPB situation.