I use a free snipe program...I set it with my highest bid that I want to go to, and it bids for me in the last 3 seconds of the auction.
I use "Just Snipe"....it's free for 5 bids per week...
You stand a better chance with it because other bidders don't know what you're bidding, and they may not bid as high themselves because of it. Hope that makes sense!