So let me get this straight, You can buy the combo card on ebay for $10-$15 shipped which seems to be the one for the iMac G5s. These look identical to the ones for the dual core G5s except that they require the additional riser? card to attach to. Sellers are selling these for $140? Are you kidding me? Where can I find just the riser card so I can get Airport and bluetooth on my DC G5 without paying more than what the G5 is worth???