What is the value of a 1964 Browning A5 20 gauge shotgun serial 4z86XXX?

Condition is everything when considering the value of a firearm.A Browning auto-5 in 20ga, will bring between 375-600 dollars for a firearm showing between 60%-95% of its original finish,and a good bore.The 60% condition reflects 375.00 dollars and the 95% reflects the 600.00 dollars.When I say original finish,I am talking about the finish on the wood and metal parts of your shotgun.