Welcome to the Forum -
The value of your revolver would greatly depend on its condition, both mechanically and aesthetically.
Also, coming into play would be the area of the country you live in, and if that particular gun has any particular collector value.
Can you post pictures? And what is the serial number? With that info available there are some folks around here that should be able to give you some opinions.
Here's how to post pictures:
Posting pictures is rather straight forward, once you get your (free) account set up at Photobucket.com or some other photo hosting Website.
You upload your pictures to your Photobucket album. Then, when you are creating your message here to the Forum, next to your picture in Photobucket will be a list of "Links to Share this photo." Simply click on the tab labeled IMG and it will copy all the URL info onto your clipboard. Then paste that in your message and, bingo, you have pictures linked to your message.
You also need to "uncheck" the "Disable BBCode" box located right below the text input box on the Ruger Forum, or instead of getting the actual picture, you get its address.
If you delete the pictures in Photobucket, they will disappear from your forum message also.
Sounds a lot harder than it really is!