Judging from its feature set, if its basic accuracy can be on par with F289 or U1253B, I'm willing to pay ~$600.
!!!
Despite the feature set and street cred of being an "EEVBlog" meter, I suspect if it sells for that price he will not sell many. After all it's an untested and unknown brand at this point - more along the lines of Brymen (although one could argue they are now a known and tested brand) and not a Fluke or a Agilent/Keysight, Gossen,etc.
Now if he needs to sell it at that price to make a reasonable profit then he may have no choice. But I suspect (and hope) that's not the case.
BTW, while in my case, I can easily afford to pay that much, since I don't
need another multimeter, even with my severe case of GAS, I could not bring myself to pay that much. I suspect I'm not alone in that regard.