B2000s made prior to and including some of 1976 used the last 2 digits reversed for year. So your C67 was made in 1976.
These have such a wide range of value based on condition, scopes, et.. 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. Recommend taking it to a gun shop for appraisal.
100-2000 usd
500 uSD
If you mean a Browning B-2000 12 gauge shotgun then the value would be 495 dollars for a shotgun in the condition you describe.
50-500 USD or so
500 USD or so
50-650 usd
About $300-$400 depending on condition and barrel configuration.
2000 or so
50- 700 usd
100-2000 usd
300-500 USD.
100-600 usd-