[drcy]

As noted, many bidders who lose an auction by a last second bid would have placed a higher bid if given a second chance. If bids were placed earlier, they would have had the second chance, but with snipe bids they have no second chance. This explains why snipe bids can and do lower prices.

If someone places a snipe bid of $200 and it's won by someone else at $205, he may say "Aw shoot, I wanted that. I would have paid $210 for that. I may have even paid $220. I wish I could go back and raise my max bid." If there were no snipe bids, but the $205 (or higher) bid by his opponent placed a day before the auction's or even 10 minutes before the end, he has the chance to say "Aw shoot, I want this so I'm going to raise my bid to $220." That's exactly how snipe bids can and do result in lower prices. And that's exactly why auction houses have 10 or fifteen minute rules. No major auction house has a fixed ending time with snipe bidding-- because they know many bidders will raise their previous max bids if given 10 or fifteen minutes to reconsider, and they know their 10 or 15 minute chance to reconsider system results in higher final prices.

In a 7 day auction, a bidder may have a set-in-stone, unwavering mind, "that's what's in my budget" $1,000 max bid for 6 days 23 hours and 55 minutes, but when he sees the bid go to $1,010 with five minutes left he may say "Aw what the hell, I'll go to $1,100." If the $1,100 bid isn't high enough and there's two minutes left he may say "Okay, I'll bid $1,250, but no higher." If the two bidders had place snipe bids, the auction would have ended at $1,010.