You’re preaching to the choir. I think I can safely say we’re all behind you on this one. Hopefully, eBay will rectify this. It would be nice if they had a mechanism to prevent this sort of thing – maybe enough complaints could temporarily remove a listing until the issue is resolved. Anyway, if he had just asked for permission to sell his “modified” machine and properly credited you, it probably wouldn’t even be an issue. But the way he went about it makes him look really slimy – especially denying it’s your design when it clearly is.