Advantages.
1. Esnipe Bidgroups is THE KILLER APP HERE. Bid on a bunch of similar items with the intent of only buying one. Once Esnipe wins one, it won't bid on any more.
2. Find a better deal or change your mind, you can't cancel an ebay bid. You just have to wait and hope you get outbid. But you can cancel an esnipe bid.
3. Some chump ebayers keep upping their bids once outbid. But not if you snipe them at the last second.