I'm no expert on this, but such last second bidding is called "Sniping." And, there are software programs that can assist in doing this. Here's but one:
Google EBay Sniping.
CorkyG - Tucson, AZ
... Lack of transparency is a huge political advantage. And basically, call it the stupidity of the American voter or whatever, but basically that was really really critical for the thing to pass...... Dr. J. Gruber, ACA Architectural Consultant