A model 66 in excellent condition was valued at $400 in The 3rd Edition of the Standard Catalog of Smith & Wesson published in 2006. The values have been rising rapidly, I just missed a perfect model 19 (blue version) that sold for $600 in June of '08 and have been crying ever since.
50-350 usd
100-400 USD
0-450 usd
No such model number in the S&W line.
100-400 USD
100-300
100-300 USD or so
100-400 USD or so
Requires professional appraisal. 100-1000 or more
100-400 usd or so
100-500 USD
You will have to call S&W