I am looking to buy a used, California-located model 642 with a 3" barrel. It is marked .38 special and does not show a "+P." The serial no. begins BMV866. It is has no lock above the cylinder latch, which is the previous semi-rectangular shape. The gun has black rubber boot grips and comes with the factory cardboard box. Looks to be in very good condition. I would be very grateful for some advice on the value of this gun. Thank you very much for your assistance.