I just purchased the gun you are talking about for $35 at a local auction. So the value, to m, is $35 or less.
About $100
The value of a Continental Arms company 20 gauge shotgun is dependent upon a number of factors. The age and condition of the shotgun would need to be considered when determining the value.
Victor Arms Company: Trade name used by the H. & D. Folsom Arms Company on firearms made for the Hibbard, Spencer, Bartlett and Company of Chicago. c. 1900. Value would be about $50-$75.
Whatever someone will pay. Pretty much decorative wall art.
The value of a 1905 model D single barrel choke bored Diamond Arms shotgun is actually dependent upon a number of things. Most importantly the condition of the shotgun.
$75
About $100.
ABOUT $50 TO $75 IF VERY CLEAN
The 12 Gauge Single Shot Shotgun Model 336882 from the Volunteer Arms Company was probably manufactured by the Belknap Hardware and Manufacturing Company that operated in Louisville, Kentucky. Iver Johnson Company and H & R, are two other gun manufacturers that made this type of shotgun.
150 dollars
What is the value of a Beebe arms double barrel shotgun?
$35-$75, depending on condition.