+1 this. Sniping is a "fire and forget" operation for me. If I win the item for the price I was willing to pay, great; if not, there's always next time.

N.B. Since I'm loathe to share my passwords with third parties, I use "esniper" hosted on my own computer. You do need a computer connected to the internet 24x7 for this to work, though. But as I host my own web site and mail server, it's not an issue here.