Depends on model and condition- you did not share that, and we do not have enough info to answer.
Model 15
Not marked AFAIK
L
Depends exactly what model 605. My dealer is getting me the stainless 605, 2" barrel, for $325. Blue was quoted to me at $25 less.
Look on frame inside the cylinder area to find the model number of a Smith and Wesson 357 mag snub 2 in stainless barrel
100-500 or so
100-450 USD
Yes.
100-345 USD
What model? Revolver or semi-auto? New? Used?
100-435 USD