Here's a tip no one ever listens to, but I believe in it.
Use snipes. For those who don't know, these are bids sent in at the last second, automatically, to beat the current bid with the minimum amount over.
They don't always work, but they significantly increase your chance of a win.
Some of the advantages:
You place your bid on a site such as "bidslammer", linked to the eBay auction number. You place your maximum bid.
You do not have to be bidding when the auction ends. The site does it for you. You could be in bed with your wife.
By setting your maximum bid, you stick to your budget. And it may well not take that much money.
You can link multiple snipes, so that as soon as you win one, you no longer bid the rest.
They cost $ 1.00 or so, but only when you win.
Bidslammer sells them ocassionally as 2 for 1 so they only really cost $ 0.50.
Just my, whoops, 1 cent, and that was me who beat you in that last auction.