I have a gun similar to this and an exra barel. believe the gun is worth $450 and theextrabarrel is worth $200.
These guns in 90% are selling for $700-850
if it is indeed in excellent condition the value would be between 550-650 dollars.
That would be a Model 732 2.5" barrel, Excellent condition $185-195 - add $25 for 4" barrel.
They were made from 1961 to about 1965, about 82000 made, value varies on condition of couse, 250-300 in rouph condition, about 400-500 in good condition and about 700 in excellent condition!
Do you mean you have an extra barrel, or are you calling the tube magazine below the barrel another barrel?
double barrel
Around $1200 to $1400
150.00 in excellent condition
Try the link below
From 4000 to 7000 depending on condition. Nothing under 3500
Depends on condition. $350-$400. Poor condition less, excellent condition more.
500-600 USD
100-300