Ok it’s very simple – sign up for a sniping service. auctionsniper.com is one of them. They charge 1% of the final value.
Just read this: Why you snipe Don’t forget to read the disclaimer at the bottom of the risks involved.
No I don’t work for auctionsniper, I just happen to use them (for the meager things I buy there), but you will get the jist of things by reading that. You can use any sniping service but the above explains why sniping is the only way to go.
And just in case you want to know credentials – I sell on eBay at the tune of $80,000+ a month