I am going to get an 1897 12ga that was made around 1907. the gun has been nickel plated along time ago. how does this affect the value of the gun. It is one of the old three screw forend modles. Would it be better to have the finish removed and reblued? And what would be a far market price for this gun. Ihave heard of cowboy shooters paying top dollor for these things.