Sorry to hear of your misfortune. I haven't sold on e-barf since 2006, maybe 2005? And haven't been happier. Fortunately for me it was a $35 nintendo game. I do buy occasionally, but am debating the merits of supporting such a nefarious enterprise. I will look out for the coin. Is there some sort of online, 'stolen/lost coin database'?
I think you should set that buyers ID out on here for other sellers. I would like to add them to my block list.