Ebay proxy bidding ... enter the amount UP TO what you're willing to pay, and eBay will bid for you incrementially till that amount
I had my fair share of people sniping auctions from me (not 2 hours, more like 50 seconds from auction end a bid is place), which has turned me off of using eBay for parts nowadays.

I did use proxy bidding, but they still bid higher, so technically I shouldn't complain ... but I feel your frustration!