At a Glance
The only bidding that matters in an eBay auction happens during the final moments. Free application JBidwatcher tracks multiple auctions and submits your maximum-offer, last-minute bids in sequence automatically; you can arrange for the app to refrain from bidding on any remaining auctions the moment you win one.
Note: This program is donationware. It is free to try, but the author accepts and encourages donations towards further development.