10-100 USD or so
Did you find out ant info on the J N Scott dbl barrel long rifle?
A couple hundred dollars.
The value of a Simmons Royal 16 gauge double barrel shotgun depends on a number of factors. Most important being the age and condition of the shotgun.
I don't see dbl in Remington, if you mean the dbl in general when when referring to a Remington firearm that's double as in double barrel shotgun, derringer, etc.
$350-$450 depending on condition
Wall hanger to maybe 100 USD
70-100 yrs; 50-100 USD