hello,,use this site for dating your rifle ,,remington use's a letter code to date there rifles and shotguns ,,it will befound on the lef side of the barrel where it meets the receiver ,,read how they date it on this site and ya can proably figure it out,,
https://store.bluebookinc.com/info/PDF/Firearm/
Serialize.pdf as for value ..prices seem to be in the 350-450 range in my parts at gunshows and in gunshops ,,they seem to be leveling off at these prices.. at least for the time being..
bigcurt