Arrant Nonsense

That is a sensible eBay rule and you should feel sensible. "Bid your max!" is the clarion cry of the bidding board. And your max is the absolute most you'd be willing to pay, and is math you need to do in your head before ever putting hand to keyboard? Would you be upset if someone won that item for one increment more? Yes, you say, you would have bid again had you had more time? Then that's not your max. Figure out that drop-dead number, add a few odd cents to it, and blow it all in the last few seconds.