Poonga, if you're doing that consistantly they wont let you back in the auction, if its any reputable one because when EVERYONE starts to do that, it wastes alot of time for the auction house/auctioneer and in most auctions time is money.
Anyways......Tetsu, the deal with "people want to up their bid by a buck or two to win the auction", don't take this the wrong way..but...."duh".
Thats the entire point of an auction.....to get the item for the smallest possible price while still beating-out the next guy who also wants it..for just a buck more than you're willing to go.
I guess I'm not making my point here cuz there isn't one to make.....you can bid however you like in an auction, but I still chuckle to myself when people brag about their "fool proof strategies". There is no strategy.....there is "bid at the last second" and hope your last bid beats the last max bid placed, or bid upfront the max you're willing to pay and forget about it.
Usually its some 13 year old who wins an auction by like 1 bid, suddenly he's an expert with a "fool proof strategy" and he's "Scamming auctions left and right" and all that crap.....as if its some super fool-proof method that only HE or She knows

Its laughable....
I usually log on, see an item, place a max bid, and be done with it. If someone beats me in the auction, so be it.....but to hear that person brag how they "sniped the item out from under me" is ridiculous....I wouldn't have paid $1.00 more for the item.....that way I dont have to play this game of "watching the auction tick down".......call it sniping, call it whatever....but its definately not some fool proof method and there really isn't any complex mathematical formula behind it......you bid, you win or you lose..nuff said.