I've known they exist for near as long as I've been interested interested in firearms, but I can't say I've ever come across one in person. There is an FFL I know of that caters to a certain celebrity. I've been told candidly that this celebrity has transferred in several Korths, as well a number of other unusual, rare, and enormously expensive firearms. I have met the man, but I didn't get myself invited to dinner or anything..heh. I wish I had known at the time I met him that he had an interest in firearms, then I would have had something to talk about.