What would you say if the winning bidder in your auction refused to pay or paid less than the winning bid?
If you win an auction, you're obligated to pay what you bid unless auction rules state otherwise. Try to see the difference between events happening during the auction and after the auction. While auction is running, your bid may be outbid by anyone. Getting outbid is not unfair. When the auction ends, highest bid wins.
Reminding again: this discussion is off-topic in this thread. Let's give Vod some space to reply to the
questions.
Vod has already replied at least a couple of times. It doesn't look like you'll get anything new out of him or change his mind.
So you're saying that it's not ok for the bidder to back out of the deal. But it's ok for the seller to back out of the deal (via shill/self bid). Sounds kinda lopsided. Is there any harm or loss for the seller if the bidder backs out?