330-500 dollars,depending on the overall condition of your shotgun,and a good bore.
Depending on exact configuration and condition, 0-400 USD.
It depends on the browning model of shotgun you are asking about,and the condition it is in.
I would need to know browning what?The model of your browning,rifle or shotgun,level of original finish remaining,and bore condition before I could assign a value to your firearm.
Your browning auto-5 shotgun was made by FN of belguim for browning in 1938.In the condition that you describe your shotgun should be worth between 450-550 dollars.
1903-1939. Value depends on condition. Your definition of excellent might not mean excellent in terms of collectable Browning shotguns. Broad range; a couple of hundred to a couple of thousand.