I always figured the logic was like this:
If an item is at about $50, but I'm willing to pay $100 for it, by withholding my bid until the last second, I may only have to pay $55 if I bid at the last moment, because it'll just be a couple increments higher than the bids that are already there.
I guess putting out my maximum bid at the start is like saying, "if you want to outbid me, I'll just tell you how right now", which is practically forfeiting the item. See, if I bid at $100 too soon, other bidders will see how much I'm willing to pay as they put in their own bids. That makes it too easy for people with deeper pockets to beat me by putting in bids higher than $100. By waiting to the last moment, they won't know I'm even there, and therefore they won't know how much I'd bid. I'm going to be at the computer at the last minute if I can help it anyway, and as I don't like being defeated by a couple dollars, it's going to make me raise my own maximum, so I would be spending more than if I just put my "lower maximum" in as late as possible as per my usual strategy. Yes, I also convolute the definition of "maximum" is when it suits me.
Of course, I'm working with the assumption that on the things I bid on, jerkier and richer people are also after.
Typically on eBay I go for the "Buy It Now" things, less drama that way.
With my bad connection last night, I wasn't able to place a bid for the entire half-hour before the auction end anyway, and I was busy for a few hours just before that. I certainly could've put in bids earlier in the day, but that would've been way too early by my logic.
Also, it would help if people in my household didn't go to sleep too early, or if auctions didn't often end at night, 'cause then I could've used any one of the other more reliable computers in the household.
Ah, well. Maybe it's a blessing in disguise. There are other Power Gloves (and for less) on eBay now.
Stay away if you're a rich jerk. >_> Go buy one of those complete NES cartridge collections or something.