Do you mean you have an extra barrel, or are you calling the tube magazine below the barrel another barrel?
double barrel
150.00 in excellent condition
The value of a Simmons Royal double-barrel 12 gauge shotgun varies by its condition. As of 2014 this firearm in excellent condition sell for around 150.00.
From 4000 to 7000 depending on condition. Nothing under 3500
Depending on condition 300-1000 USD.
The value of a double barrel Harrington Richardson 1900 20 gauge gun depends on its condition. This gun in excellent condition is valued between 180.00 and 240.00 as of 2014.
The value of a 1914 Springfield double barrel shotgun made by J Stevens depends on its condition. This model in excellent condition is valued between 599.99 and 699.99 as of 2014.
Not more than $600 if in excellent condition.
The Winchester model 101 over-and-under double barrel made in 1963 is worth about $800 to about $1500 depending on its condition and features. The serial number of this gun would be helpful when determining value.
Winchester Model 416 Rifle (Not a gun): Smooth bore barrel. Double pull trigger, 363 Feet per second: original cost $21 Excellent condition=$50 Good= $25 to $30 Fair=$15
The value of a Amadeo Rossi 16 gauge double barrel gun with the serial number Rg B33753 depends on its condition. This gun in excellent condition is valued between 200.00 and 300.00 as of 2014.
The Stevens doubles in .410 can reach over $500 in excellent condition. sales@countrygunsmith.net