When a person has been confronted with stealing my colored pictures, for example, they say oh no, a friend of mine did it, it's perfectly fine!
eBay refuses to do anything, so I refuse to have anything to do with eBay as people are making money off of my creative work (which is, I believe by copyright, MINE).
It's frustrating, but there's nothing one could do about it.
I've recognized my scans as printed 'reproductions,' too. I don't think I have any legal reason to confront this person, though, considering it's pretty much public domain.