Oh and to answer your question from the OP.... a friend of a friend of mine named Mike from Camore (he runs a "Black Rifle Sanctuary") spent about $4,000 on his build (in which he bought his perfectly machined receivers and barrel from the good folks at ATRS directly).
FYI In the past, I had observed that some people were selling just the MS receiver sets NIB on the EE upwards of $3,000!
They were probably selling these in between ATRS's batch production runs before the CFO put the kybosh on production... obviously these guys were seeking profit margins in excess of 100% Who knows if they actually got those prices.... that is their business.