Hey Peter,
Dagor file’s price just went down to $34. 
M60 mgs can be switched out to M240 or M249 in CAD before printing so that’s not a big deal.
I think the future is near when some manufacturers will simply sell CAD files of model kits and modelers will be able to print them with their 3D printer to put together at home. I can see that happening in a decade.