Many forum members may feel awkward offering pricing estimates in public postings... I know I do... based on images of a rifle. It is hard to establish an accurate price range without a hands-on inspection of an antique firearm. Despite your good photos, not all of the surface is clearly shown, nor can imperfections or possible alterations be seen. Perhaps some members will contact you off-line with their estimates or value ranges, but posting values publicly can get embarrassing at times without really seeing a gun in-hand.
You might want to consider checking last year's auction results for similar Ohio half-stocked rifles and making your own estimate of its value, since you are in the best position, i.e., gun-in-hand, to fully understand your rifle and its merits and demerits. A good place to start would be past auction results at the Old Barn Auction in Findley, Ohio. They have a couple big antique gun auctions every year, heavily in Ohio muzzle loaders, and their web site provides winning prices from past auctions. The last auction was on February 18th of this year, with a large number of Ohio guns, both full- and half-stocked in a wide range of quality and condition. They provide good photos of every gun, and photos can be greatly enlarged to see just about every small detail. A lot of their stuff falls in the mid-range where your rifle would be, so it is a good source for you to use in establishing a value for your rifle.
Shelby Gallien