Browning's web site has serial number data you can research. A few hundred to multiple thousands of USD depending on EXACTLY what you have, condition, box, papers, accessories, etc..
50-500 USD depending on specifics.
$1600 if in excellent codition
To determine the exact value of a Browning automatic 20 gauge shotgun made in Belgium, a couple factors would need to be taken into consideration. Some of these things are the age and condition of the shotgun.
100-10000 USD depending on specifics.
50-1500 USD depending on specifics.
300-500 USD.
100-1000 USD or so
50-500 usd
Impossible to answer without the serial number.
50-1000 USD or more depedning on specifics.
50-350 usd
Browning.com has sn data under customer service.