Impossible to answer without a detailed description of all features, condition, finish, box, papers, accessories, etc..
Requires professional appraisal.
100-400 USD
It should be.
You will have to call S&W
Your J frame Smith and Wesson 38 snub nose revolver was made sometime between 1976-1977 with the serial number that you have provided.
About $250. May be more or less, depending on condition.
300-600 USD
100-400 USD or so
You must call S&W to find out.
bone grips, chrome frame snub nose.
50-550 USD or so
100-400 USD