It's a no win situation....
I am new to the club but not at all new to ebay. It is a no win situation. Ebay will do nothing. You will not be able to prove it and in the long run, you'll have wasted your time and effort and will feel even more frustrated than you do now. The seller will not be held accountable at all and without proof you will just come off as a sore loser instead of someone trying to stop someone from cheating. By the way, I think you did the right thing by not posting the names on the board. The members who buy frequently have most likely had the same experience.