MSRP is an incredible 4.200$ as far as I can remember.
But retail prices already dropped to 3.600$
Mags are proprietary. I have not yet dared to look up what they will charge for one. But it's not gonna be a bargain. A 20-Round-Mag for the 551 sets you back 90$, so you get the idea.
I heavily doubt there will be a lower for AR10-Mags for this version. And even if, it probably will be the same price as a complete AR10...
Although I've been waiting for years for the 751 SAPR I have to oblige myself to wait and see for some accuracy results. I have a 551 and so far it is my favorite 5.56 carbine, but it is also far from being a precision tool.
The US-style 556 stock on the 751 is an indignity, no matter how ergonomic it may be, and the OEM-sights are an insult. Makes another 800$ for a senseful replacement. Plus some mags.
I can get almost two M1A Loaded or a NM and a ton of mags and ammo for the same price.
So, well, I'm impatient and indecisive.