I would be interested to know which model in .357 I would have a better chance of acquiring with a 3-inch barrel in a $500 or so price range: 66? 686? others? I am looking at it as a HD gun / vehicle carry, possibly occasional CC. I have a 4-inch model 65, and would really like to get a good .357 with a 3" barrel and adjustable sights, without paying a premium for a new one. Looking for a shooter, not a collector. Appreciate any advice/opinions.