I too have been burned on EBAY with last minute bids that I thought that I had won.
The way that I have solved the problem is to make a bid that is the absolute, top dollar value and lock it in early. If it sells for more, then I just don't care. Less, and I have made some money.
Marc
What you do jacks up the price of things. A way to get winning bids for less is sniping.
99% of auctions I see are decided by snipers, me included. I seldom lose an auction and I use a FREE sniper and never bid manually. If you want to win ebay auctions, use a sniper. They bid for you in the last 6 or less seconds and any manual bidder doesn't have a chance to make another bid in only 6 seconds. Most ebay bidders bid only a few bucks above the current bid. With a sniper you still have to be the high bid! Another advantage of a sniper is you can change your mind as the bid doesn't get made immediately.
No need to pay for snipers either as Gixen is one of the few free snipers. It works just as good as the 1% fee snipers and I've used it for hundreds of bids without any errors. If you post a link to Gixen on your webpage, you get free backup sniping as well (Gixen makes the same snipe from two different servers.)
See my page for a link to Gixen:
http://members.fortunecity.com/pjsauber/
My fleabay handles are ModelA4Rd(seller) and 28ModelAr-RPU(buyer). Yup, 2 IDs. I once had a sleazy seller refuse to sell me an item I won after I cancelled a bid(It was for a F100 Model A steering box I eventually paid $275 for a terrific bargain for an $800 item) I tried to bargain with the seller to add a Buy It Now deal for $275 before the auction had any bids and he said yes but never followed thru. With no follow thru, I cancelled my $275 bid. I won the auction for $201 with a snipe but he wouldn't sell as I'd offered him $275 for Buy It Now.
I also used to believe the Ebay stated policy that a bid is a binding contract. Ha ha on that one. If the seller changes their mind and won't sell to you Ebay won't do anything to make the seller sell. On the other hand, if you change your mind before paying and decide not to buy Ebay won't do anything either to you the fake buyer. All Ebay is interested in is collecting their high selling fees that they have raised repeatedly. One good thing, PayPal will give you your money back if you pay thru PayPal, return the item, and the buyer misrepresented. In that case they are on the buyers side. Fear of negative feedback used to motivate both seller and buyers to be honest, but now only buyers call make a negative feedback!
I once "sold" a bicycle for $1,000 to a deadbeat seller who made several bids in the last 24 hours(not retractable according to Ebay rules) and refused to pay when the auction ended. Ebay's response to me was, "relist the item." I left a negative feedback to the deadbeat buyer and was rewarded with a negative in return even though I did nothing wrong. Ebay's response after I complained about the feedback, "it's only an opinion, don't get upset about it!"
http://www.gixen.com/