Hi all update, received confimation from eBay that the CBB is no longer registered, they suggest I raise an unpaid against him now, but once again I think for the small amount it would be too risky as he would know.
eBay must know this person had been bidding for years and not buying more than the occassional penny book. They do not escape a contribution of blame.
Suthrnjewl, I passed eBay support the AuctionBytes link about CBB's and that must have clinched it, thanks for the link and sharing your grief so I could manouvre carefully
I hope Suthrnjewl's posts and mine will help others deal with these parasites.