I checked the serial number; your rifle was made around 1911. The worn-off bluing detracts from value, the tang sight adds value. Now....some of the other things to consider are:
Is it a carbine (20" bbl) or a rifle (26" bbl)?
Octagon or round or half-octagon barrel?
Full, half or button magazine tube?
Shotgun buttplate or crescent?
Forend cap or no?
Straight or curved gripand lever?
Is the wood factory checkered?
In very general terms, octagon or half-octagon long barreled rifles are worth more than round-barreled rifles, which are worth more than carbines. Checkered wood or curved levers will add value. Assuming you have a round-barreled rifle model, straight grip, full magazine, crescent buttplate, no checkering or engraving, in the condition you describe? I've seen them lately between about $500 and $650 here in Ontario. About $100 of that price is the tang sight.
BTW, that's a great hunting rfle. The .32 Special is almost exactly the same ballistically as the .30-30, for all practical purposes. Good for deer to 200 yards, assuming your rifle and you shoot accurately enough.
Hope this helps. K.C.