Can't be answered without a DETAILED description of ALL markings, barrel length, finish, grips, sights, box, accessories, papers, condition.
It is a double action pistol
Single action or double action? Exactly how is it marked? sales@countrygunsmith.net
The Smith & Wesson Model 3 was a single-action
Need to know caliber, barrel length, and type of action.
Impossible to answer without more information, such as caliber and type of action.
You will have to provide a caliber, type of action and barrel length along with overall condition.
100-500 or so
Impossible to answer without knowing type of firearm, caliber, action, markings.
No
Yes
Specifically no. Most Smith & Wesson pistol models are both double and single action, meaning that they may be cocked for single action and also operated by trigger pull alone in double action. However some Smith & Wesson automatic pistols are double action only (DAO) and are designed for double action alone. These pistols may not be cocked and are operated by a long trigger pull.
A Smith and Wesson M&P 40 is a .40 caliber hand gun.