Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Auto 5's with poly-chokes, compensators and recoil pads (other than Mag 12's) will reduce value. Near mint guns and original box will command an extra premium. Recommend taking it to a gun shop for appraisal.
70-700 usd
Based on description 100-500
0-1000 usd
impossible to answer without a detailed description.
-500 USD or so
200-500 USD
100-1000 USD without more information
1932, 100-1000 usd
1972, on line auctions.
500 USD
50-400 usd
50-800 usd