Blue Book of Gun Values will help.
there is no such thing
whatever someone will pay for it.
The company is worth millions.
Your Beretta .32 Auto is worth $100-200, depending on condition and markings.
I just bought a beretta gardone 6.5. Looking for more information on it now.
100-500 or so
Impossible to answer without a detailed description of all markings and condition
50-200 usd
Famous firearms maker.
Value depends on EXACT model and condition, but a pistol such as the Beretta Model 21 may be worth $125-200.
50-150 USD
AFAIK, Beretta has never made a handgun in that caliber.