Posted By:
warshawlawI don't think I'm giving away any secrets here: use a sniper service (I've had very good experience with auctionstealer.com) and group the two items together. This function allows you to bid on the earlier one and if you get it, automatically cancel your bid on the second one.
What I hate are the situations where you find a really tough item and successfully take it, then another one is offered a week or so later in better condition. Doh!!