Superposed shotguns are very collectable when in top condition. Values have a wide range due to so many variations and grades of the Superposed and other Browning Over/Unders. Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Recommend taking it to a gun shop for appraisal.
Basically impossible to value with just the model description.
100-1000 USD or so depending on specifics
300 USD
50-500 USD or so
100-1000 USD or more depending on specifics
50-300 USD or so
50-200 USD
100-1000 usd
Couple of thousand USD
100-600 USD
The BL-22 Grade 1 is $495 new. I've seen them for $250 used.
less than 100 to over 2000 USD depending on specifics.