Impossible to answer without the sn. 50-350 USD
You will have to call S&W
100-425 USD
1969? 1969? 1969?
You will need to call S&W
No
probably 1961
100-500 USD
100-400 USD
With no other information supplied, 100-500.
What serial?
Stainless Steel Revolver
Your Smith and Wesson model 66 which was made in 1985 will bring between 375-550 dollars,depending on overall condition and a good bore.