Believe it or not, there is a forum for those who find themselves in similar situations:
http://www.aspkin.com/forums/
Never had any reason to post there....and have not read much at all there, again not had any reason to.
I know of one seller who filed a complaint with the San Jose, CA BBB and was surprised as to how much quicker he was contacted by ebay in regards to his concern as a seller.
Good luck.