I have a 38 taurus ss cia revolver in great shape with box and papers, how much trade in do you think I would get towards a new 9mm? I have a new S&W 637 and no longer need nor want the taurus. I am considering Kahr, Ruger, S&W, and CZ, the requirments are has to be SS, all metal (no plastic) and be 9mm. Fell free to give my opinions, and the new 9mm will be my permanent nightstand home defense gun / range gun.