A single shot pistol, a Derringer and even a revolver are technically NOT considered semiautomatic.
To be semiautomatic, the weapon would need to use the energy from a previous round to cycle the action. Revolvers use the muscle energy of the shooter's finger to revolved the chamber.
The actions operation.
0-60 usd
50-100 USD
shotgun, rifle and pistol.
Yes, Coonan is one.
Check the receiver and barrel
What model?
Depending on EXACTLY what you have; 100-1000 USD
50-1000 or more depending on the specifics.
Probably not. However some pistols can be fitted with an aftermarketlaser sight.
Impossible to value with only the serial number and no other details.
value of smith & Wesson model 5906 pistol