100-400 USD
50-500 usd
Yes, Browning made the B80.
Your Browning B-80 in the description you described is valued at 450 dollars.
Depending on condition, from 250-450 USD.
Not sure if it is a B80 or an A500, but it was made in 1988 in Europe (not Japan). Depending on which model, $400-$500.
$250-500 depending on condition
1981
Is it a Browning? If so,is it a BPS,B80,A500,Double Auto,Auto5,Gold,A-Bolt,O/U or SxS? What gauge? Your question is sort of like asking, "I have a truck. What is it worth?".
Download a manual from Browning or take it to a gunsmith
Best left to a gunsmith
Best to ask a gunsmith for help.
$250-500 depending on condition