By todays standards not too much. I bought a Md 1886 around 1960 for somewhere around $50, it was in fair condition and sold it some years later for about $200 if I recall.
They are a large fairly heavy rifle and were chambered for large caliber black powder cartridges, they’re a handsome rifle in my view.
I had one of the rarest of the original production 1886 Winchesters in my collection. It was one of only about 100 made: an 1886 Winchester Saddle Ring Carbine. The one I had was one of the few that was made in .45-70, probably less than 25 produced. It had most of the original bluing on the barrel and hardware, and still bright case hardening on the frame.
The State of California brought it into Simms' Hardware when I worked there when they had confiscated it from the estate of someone who had been committed to the State Hospital. They literally brought a whole bunch of long guns into the store in a shopping cart and I spotted it. I normally would have done the appraisal and purchase but I wanted that gun so I had the store owner do the purchase so I would have an arms length involvement. I bought it for my store discount at $175 after he bought it. I would have paid a heck of a lot more for it back then! The store owner OK'ed my purchase.
I sold it several years later for around $5,000. I wish I still had it. It would probably be worth around $75,000 today.