They just recently opened a gun store in my neighborhood. If I'd had $21K sitting around idle, I'd have bought an MP5 Saturday. It was freaking beautiful. Fantastic guns. It was "new", (pre-'86 but unfired except at factory). It's already gone I suspect.
There’s a device known as a “Fleming auto sear” which can be acquired for about $21,000 that will allow you to turn any semi-auto HK into a full auto MG. You can swap it between your semi-auto HK91, 93, and 94 as you see fit. The sear is the only serial numbered transferable item in this case. I have a PTR-PDW that I want one of these for. I can’t justify that kind of cash for a toy though. I did just get my NFA trust established and will be acquiring some cans soon however.