Re: value of a winchester 1886
That rifle was made in 1892. I doubt the receiver was nickel plated; it was most likely color case hardened, which was the standard finish on that model at that time.
Unfortunately, those inlays are not factory; they appear to have been done by a previous owner and, rather than increasing the value, actually reduce it. In that condition, and with the inlay "enhancement" I would value that gun at $1200 or so. Let's see what others say.