Without a picture or a thorough technical description of the condition, it's not possible to give an exact value. There are multiple variables also ommitted in your description, but It is likely a "Smith&Wesson Military & Police Model of 1905, 4th Change" (yep, that's a mouthful, commonly called the "M&P) that you are talking about - 4 inch barrel and square ended grips. It could range from $75 to $300 based on the internal and external condition of the gun. If you email me at jellyroll4@excite.com, I can direct you to better resources.
Seldom exceed 60 to 70 USD or so
can you show me a picture of my .32 cal. Smith & Wesson hammerless revolver serial #182202
38 special is only a revolver caliber. that's like saying a 44 magnum revolver or a 500 special revolver. a revolver is a revolver
Seldom exceed 80 USD
It depends on what you mean. A .38 revolver may be a .38 special, but there are other types of .38 besides just the special round.
38 special
A fine revolver.
The "J" frame is the Smith & Wesson small frame revolver such as the model 36 .38 special. The smallest frame, as in the model 36 Chief's Special.
You will have to call S&W
Good revolver.
No
A ".38 +P revolver" is simply a .38 Special revolver which is rated to fire +P loads. It's still a .38 Special, and the +P doesn't change the dimensions of the round itself.