ive noticed that at auctions ive gone to -
when youre there, they start at, say, 100 :
one hundred, one hundred, one hundred, ok then, eighty, eighty (etc)
it gets down to 50 and someone bids, and then starts to rise again.
but, if youve added a commisioned bid, theyre just going to go to that, and sell it you. you wont get the drop down to 50, as they know youll pay 90 (or whatever)
a commisioned bid is so much easier, but i just dont think they work for real-life auctions?