I have a Colt Commander .45 Pre 70`s made in 1951 serial# 11938-LW. I would like to know what it is worth.If it isn`t worth that much I was going to have it customized.It is completely original and about 80% of the finnish is still on the frame.Not much wear on the slide just on the frame where your hands hold when you are shooting.Thanks in advance.By the way I`m only looking for a ballpark figure.