Need a detailed description of all markings, barel length, caliber/gauge, sights, condition, accessories, etc.
Yes- IF the flash suppressor is permanently attached by welding or hard (silver) solder, and is not readily removable.
Which pistol? Most production pistols have a barrel length of 1 to 8 inches.
From mouth of barrel to where it meets the cylinder.
What are the markings on the pistol?
You will need a professional appraisal
yes
Need to know who made it and what shape it is in.
50-180 USD
A pistol is a single hand firearm with a short barrel.
No
125mm
10-100 usd