Yes, Browning made the B80.
1981
Download a manual from Browning or take it to a gunsmith
Best left to a gunsmith
100-400 USD
Best to ask a gunsmith for help.
50-500 usd
Depending on condition, from 250-450 USD.
$250-500 depending on condition
You need to see a gunsmith.
$250-500 depending on condition
Several, the auto5, B2000, B80 and others