Thank you SO much! Got through to someone, who is now finding out what to do about it.  I really appreciate your help!

Thank you - that will work as long as my lawyer can act before the current auctions close!  In the meantime, I have set to be notified of every new listing and have been saving those emails. I guess it won't stop him from selling things or bring back those he has already sold, but it will at least go some way toward ensuring he can't just flog them off and pocket the money! I did report the most recent listings - still not easy, because there isn't a relevant option, and it's not clear that there's an actual human reviewing those reports and doing anything about them.