I highly recommend using a sniper service. I know some people hate snipers, but my aim is to get the best price and sometimes sniping helps me save quite a bit. I recommend Gixen highly. They're 100% free, they don't have a limit as to how many auction they'll snipe for you before they start charging you cash, and really they're very efficient. You just have to register and give them access to your eBay account. But worry not, I've used them for ages and they've never had a data breach or lost my data to hackers, unlike eBay itself.
To set up a snipe all you need to do is sign in, enter the auction number and the highest amount you're willing to pay. About 8 to 10 seconds before the auction ends, it'll bid for you. The only time it fails for me is when my bid isn't high enough. I love it.
Check it out gixen.com!