The actual value of a gun can change drastically depending on the condition, proven provenance, rarity, and the current market demand. Demand is constantly changing, which means the value is constantly changing. The condition would include the finish and mechanical wear. Even in rough condition, a gun with proven provenance could still be quite valuable. Modern Gun Values or the Gun Trader's Guide are both good sources of information. Current editions of these books can be picked up at common places such as Wal-Mart or Barnes and Nobles.
Not a thing
what the value of a will davenport single shot shotgun 1885 in good conditcion
what is a remington 20ga shotgun patented 1891,1903,1904 worth?
A fully functional but well-worn single shot will usually retail for about $50.
50-110 or so
depending on the make, age,and condition that shotgun could be worth nothing up to $3000.
50-100 or so
It's worth about $50.