I have seen other people posting about this 
person selling fancels of cel other people own. I 
also remember someone saying only the actual 
owner of the cel could do anything about it.

Anyway, they just posted this auction:

http://cgi.ebay.com/ws/eBayISAPI.dll?
ViewItem&item=3212551260&category=13665

I own the bottom cel of their 2 cel set, the real 
one, not the fancel. It was NOT a cheap cel. 
Also, from the pose this isn't a copy of a close 
cel or another in the sequence, it is mine.

I am even more irked because before I read about 
this person's habits I sold them a couple of 
cels. At least if they copy those, they own the 
actual cels.

Anyway, do I just have to grin and bear it, or is 
there anything I can do?

Thanks,
Remi