Thanks Simon for your feedback and sharing experience. For me this was not the first time, I mean I had another "ebay" surprise that was told me by a german customer who found my lithos being rudely photcopied with a laser copy machine on light cardboard in an ugly way (he purchased a copy) at a couple of euro and the worst was he deliberately erased the copyright/credit line on the bottom. That was very very stupid by his side. He was a german guy selling inside germany and after we were on his neck with a heavy letter from my lawyer said "sorry, please don'ty persecute, won't do it again"
So, your suggestions are more than warmly welcome but once we publish anything authomatically will be a target for such thiefs. This guy had more than 100 feebacks on his ebay account....