The S&W Model 57 chambered in .41 Magnum with a 6" barrel will range from about $400 to $2000 depending on condition and age.
I would start my search at Smith and Wesson first.
the value of a smith Wesson 8 inch barrel model 27-2
what is the value of smith and Wesson model 27-2 N479279 6" barrel nickel plated never fired
What model?
50-500 usd
100-550 USD or so
It was Smith & Wesson Model 29 with 8 3/8" barrel.
The 41 Magnum is the Model 57 or 58. The Model 29 is a 44 Magnum.
100-600 usd
100-200 USD
200-300 US dollars.
0-500 usd