I was just bidding on a banner and after every bid I was outdone by 1 gold. I sat there steadily increase of increments of 1000 gold, then 5000 gold and then I just went 10000 more and it seems like someone is running a script or something right now. That or I'm really unlucky and one of the three bidders is directly bidding against me but I find the odds less than winning the lottery and it a little suspect that immediately after placing my bid I'm out done by a single gold piece, including the fact that it takes a minute for the site to update.