JohnKDM re NFA prices
According to the "Forgotten Weapons" site, there is exactly 1 transferable M249 Saw/MiniMi
in the US. Don't know the details as to how that 1 happened, but it apparently did.
Morphy's recently sold it, and with auction fees on top of the bid price, the proud new anonymous owner paid a bit over half a million for the thing.