Another yard sale gun. Maybe 2. A question

[skeet]

Got an ol S&W 916 pump with a slug bbl...pistol grip stock and regular as well as 9 boxes of slugs and a couple boxes of buckshot.. Mostly the good sabot slugs too Fed Premiums. Was a fellows bear gun when he rode into the mountains. He said too many grizz so it just ain't worth it any more. If ya shoot one they put ya under a microscope Paid a 100 bucks. He also has an italian copy of an 1860 Colt 44 for sale. Wanted 75 bucks and it was unfired. Still has it. Is it worth it? I know nothing of that blackpowder stuff. I'd only buy it for resale. Anybody have an idea of the value??