Anyone shoot a Beretta S682?

I was contacted by a guy today asking if I wanted to buy his Beretta S862 over and under 20 Ga. I was told the gun has not been shot in about 20 years. The current owner was the only owner and has all the original paper work and case. Does anyone know what this gun may be worth?

Oh yeah the guns stock has no handling marks and barrels are in perfect condition I would say the gun is in the 85-95 % range