100-250 USD
value of a harringtonand richardson 1900 28 gauge
2 cents
50-100 USD
100-450 US Dollars
Shotguns are normally referred to by gauge, not calbier. 28 gauge is .55 inches.
$500 and up, depending on condition
50-1000 USD or more depending on specifics
100- multiple thousands depending on specifics.
A good place to try is gunbroker.com
A Sportsman long range 12 gauge shotgun is worth $845 in good condition. The shotgun weight is 8 pounds, 4 ounces and has a 28 inch barrel.
50-100 USD
Think of a lead ball which is the diameter of the inside of the barrel of the shotgun. The gauge of the shotgun is the number of balls that size to make up one pound. 12 balls - 12 gauge 20 balls - 20 gauge 28 balls - 28 gauge Exception - .410 bore is the actual bore diameter