Your description states that this is a 4-screw gun. It is a 3-screw gun. The modified front sight would be an easy fix for a gunsmith to remove the patridge blade and pour another red ramp in the dovetail. I don't think that I would have this gun refinished unless you are willing to have more in the gun than it is worth as well as decrease it's value. As others have noted, the diamond target grips have value as does the rather rare "clamshell" presentation case. The value of the gun in CA is probably higher than in my part of the world. A fair price for you might be based on how rare an opportunity to purchase such a revolver is and how much it means to you to own it. It is a fine revolver and I am certain that you would be proud to own it. Good luck!