Recently got these 2 from my Father-in-law, I came here in hopes to get some pointers on selling them for him.
Colt sold a Gold Cup National Match in factory electro nickel that would polish up like that. They run around 2500 - 3 grand. I think they may have even came with those same grips.Hope somebody here can help you out. I know little of Saiga's and their accessories, but on these you should be able to check out prices on the internet and adjust for condition, etc.
I can't say that I've ever seen a nickel plated Gold Cup before, but a lot of its value left when they did that. It has been changed from a highly desirable target handgun into what probably will be a very accurate carry gun. If its light-weight operating springs (standard on Gold Cups) have not been replaced, it will need at least a heavier recoil spring, and probably a full-power mainspring also for combat reliability which is of paramount importance in a carry-gun.