Blue Book of Gun Values might have an answer.
20 gauge
The same year you shot your gradma you freak
Try the original maker and e-gunparts.com
10-100 USD or so
is a ranger s/s 410 ga shot/ made by sear or Winchester
50-100 USD
Yes.
much has to do with overall condition to include the bore. then WHO made it and gauge (caliber) and the serial number if any. information is usually on top of barrel or side of receiver.............
Try e-gunparts.com
Double
Double
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.