The Model 57 was made from 1964-1993. Provide the sn if you want it narrowed down, or call S&W and they will tell you.
Lack of sales.
The Model 57/657
100-600 USD
@1973
50-500 Usd or so
50-600 USD or so
Early to mid 80's
50-800 usd
100-1000 without more details.
100-700 USD if factory and depending on condition.
100-600 USD
57-66