When I was in high school, which was recently, if you knew the right people you could get most any drug or gun you could think of. As I recall I turned down the following offers for unregistered NFA guns: various Mac's and Uzi's for $800 each, several suppressed .22 pistols for $600 or so each, an m249 which I never got a price quote for, sawed off 870's for $350, mp5k's of god knows what origin for $2,500 and the most interesting one, an unregistered 1928 Thompson with two 50 round drums for $2,000. I am not interested in going to prison, so I declined all of these offers, but my point is that there are plenty of unregistered machine guns out there, and if you want one that badly, they are easy to get. It may seem like Thompsons are old and out of style with the black market, but from what I have seen, many people in the drug community have TSMG's for novelty reasons.