50-1000 USD or more depending on specifics
Smith & Wesson
Someone at smith-wessonforum.com should be able to tell you.
@1975
300-600 USD
Requires professional appraisal.
Auction sites, old gun catalogs.
100-400 USD or so
Your J frame Smith and Wesson 38 snub nose revolver was made sometime between 1976-1977 with the serial number that you have provided.
No way to answer without the serial number and the model number.
It should be.
Between 250-450 dollars,depending on the overall condition from good to excellent.