Anything from nothing to thousands of Dollars. There's no way to narrow it down more than that without knowing who the manufacturer is and what model the revolver is.
Winchester did not make a revolver in 32-20.
150.00
10-90 usd
25-75 USD or so
Requires professional appraisal
25-75 USD
10-100 USD or so
Requires hands on appraisal
No such weapon made by S&W
Blue Book of Gun Values
20-100 USD or more depending on specifics
50-350 USD or so