There is nothing illegal or bad about placing a bid with only seconds to go. I've never fully understood why someone would think otherwise. As long as the bid is place before the offical auction end date it shouldn't matter if you bid on it three days ago or at the last second.

I usually try to snipe most of the auctions that I bid on. In fact I wrote a little utility to do it. It's not perfect but it works pretty well for me. The utility I wrote can be downloaded at the following address:

http://www.SnipeSoftware.com