I am going to try to sell a Colt Challenger that was my father in law's. Serial number indicates 1951 mfg. It shoots fine. It has wood grips which I don't know if those are original or not. I see many on gunbroker that have factory plastic colt emblem grips. The frame is perfect and the left side of the gun in nice but there are some pretty good size rust pits on the right side of the barrel and right side of the slide. How bad will this effect the value? Do you think I could get 250 out of it for a plinker or does the rust damage it further than that?