I used to do this little trci where i would contact the other bidders, and we would talk about who was willing to pay more, and sorta agree no to bid.. This was usually involving bids on Rare Music CD's. So most of the time the deal involved sending the other person a copy of the CD.
This gave me the idea to just ask winning bidders for copys of the CD's they won. Worked Great. I think I did this a tleas 10 times, and NEVER got denied. EWveryone was like "Sure" I would just paypal em a few$ and they would send it. Usually, they wouldnt even want the money. We usually had the same interests, and we were cool with each other.
But alas, Ebay has smartened up. they now hide the bidders name, and make it so you cannot contact them. Sucks Huh?