At least 400 dollars,
I purchased one new at a gun show for about that much...little more
They are rare and they are nice
To the best of my knowledge Ruger never made it's old army revolver in .36 cal, only .44 and .45 caliber. Many other manufacturers made a similar looking Remington copy in .36, it could be one of those.
200 USD
Ruger. 20-250 USD depending on specifics
100-400 US Dollar
50-350 usd
Blue Book of Gun Values
Ruger's website lists the current offerings.
You need to contact Ruger. You may have a prototype
it is not a revolver it is a pistol and it can range from 1,000 to 2,000 us army depending on the condition.
50-200 USD depending on specifics
100-300 or so
Ruger website, customer service, historical data, revolver, single six, find your serial number.