Gun shops, gun shows, on line auction sites. S&W website
It could be as little as 50 or up to 1000. It depends on EXACTLY what you have
If you are referring to Dan Wesson Arms, it could be anything from .22 LR to .44 magnum.
Could be a Colt, Smith and Wesson, Ruger or any of a dozen other makers.
How are we supposed to answer this without knowing what the make and model of the pistol is? You could be talking about a Jennings, or you could be talking about a Walther - there's a significant difference in value between the two.
It could be one of a half dozen or so. A detailed description of all markings is needed.
There were two companies known as Interarms. The first was an importer/exporter, formed in 1953. They did not manufacture firearms. The second - and current - Interarms is a subsidiary of Hi Standard, and does not manufacture a PPK or PPK/S pistol. If what you have is actually a Walther PPK/S, value could range anywhere from $300 - $800, depending on specifics.
It is impossible to tell without knowing more details. The gun has to be in decent shape to be worth anything.-No scratches-No dents-No rust-Must be operableIf your Walther meets the following criteria, it could be worth anywhere from a few hundred bucks up to $10,000.
Call S&W and they will tell you when it left the factory. It could have been made anywhere from a week to a year before.
Depending on EXACTLY what you have and its condition, the range could be from a few hundred to multiple thousands of USD.
Walther PPK pistol and Heckler and Kosh UMP-9 Sub machine gun
Call S&W and they will tell you when it left the factory. It could have been made a week to a year before.
Smith & Wesson made several different pistols in .45 ACP, including an M1911 pattern pistol. You'd have to be more specific about which model you had in mind before this question could be answered, as the different models vary quite a bit.