A couple notes here. I noticed the carbine stock. Does it have a carbine length barrel? Original sight is going to be expensive. More photos would help figure out if is should be restored as a deer getter or carbine.  A close up of the area of the sight dovetail may show plugged screw holes. A photo of the front of the stock will reveal the condition of the stock. If restored as a deer getter trading an original carbine stock for a rifle stock could get you some funds for a lot of do-dads for a deer rifle (dovetail sight or good scope).