What it's worth and what you can get are two different things. 200-2000 USD
500-1000
If this is still available, I would offer $1500.
Browning Arms Co, never manufactured a Revolver.
It depends on the model
550 USD
50-400 usd
That is not a valid Browning model designation.
50-500 usd
50-500 uSD
100-1000 usd
100-500 USD or so
100-10000 USD depending on specifics.