100-5000 or so depending on EXACTLY what you have.
What model?
1970
No such revolver made by S&W
Smith and Wesson 500 magnum revolver
Yes
The value of a Smith and Wesson Model 51 22 Magnum Revolver would actually depend on a number of factors. Some of these factors would include the age and condition of the Revolver.
An N frame .357 Magnum revolver.
A Smith & Wesson .44 Magnum revolver.
You take it to a gunmsith.
What is the value of a model 24 Smith & Wesson revolver with a 4" barel? It has never been fired.
I would start my search at Smith and Wesson first.
Rare is not the right word. It was a limited edition.