I'm in the market for a S & W model 19, 6" barrel. Anyone have any advise on what to look out for? I've also seen the price on these vary quite a bit and outside of the normal condition subjects is there anything in particular that makes one more valuable then the other? Nickel seems to bring less money and I'm aware of a rare snub nose in the very early production but neither apply to me. Any input is welcome. Thanks guys!