I used to use an auction sniper a long time ago, but then I started doing it manually. I open the page twice, and on one I go to where I'm going to put my bid in and have it ready to just hit enter. On the other one, I have the page that I keep refreshing.
It's kind of exciting and it feels like I actually won something if I win.
A lot of people snipe now, so you have to make sure you put in the absolute highest you're willing to go--which, I suppose, is the point of an auction anyway, but if you start bidding early you get attached and it's hard to let it go. $10 turns in to $50 because you can't let "her" get it!
What's a chav?
Oh, and good luck!