I paid just under $730 plus $30 for insured shipping at Dahlonega Armory, which I found on the gun.deals website. The Email for Price got me a nice $150 off. It was at my FFL in a week. That's for the Combat model (simpler slide milling) with optic cut, without threaded barrel. They quoted $90 more for the Elite model.
I'm finding Gen 5 Glocks MOS in the low $600's (non blue label pricing). If this thing runs and is accurate, then it seems like a really good value.
Pics of the optic mounting hardware and BUISs that I hadn't seen elsewhere.