Depends on EXACTLY what you have. Could range from 50-2000 USD or more.
Depends on which powder, and which loading of the 9mm.
$50
What kind of gun? Most gunshops sell magazines and if they don't have any for the particular model, they can probably suggest where to get them.
Submachine gun rated 9mm
$100-$125. Low dollar gun of indifferent quality.
It depends on which gun and what shape its in. In general, about 50-80% of the price of a new one.
.380 ACP is 9x17mm. That's the only cartridge that gun can fire. 9x19mm (a.k.a., 9mm Parabellum or 9mm Luger) and 9x18mm (a.k.a., 9mm Makarov) are NOT compatible with these guns.
In the range of $120 - $170.
A 9mm of some type. What markings are on it?
No.
.380 ACP is 9x17mm. That's the only cartridge that gun can fire. 9x19mm (a.k.a., 9mm Parabellum or 9mm Luger) and 9x18mm (a.k.a., 9mm Makarov) are NOT compatible with these guns.
depends on which 9mm and which gun. The 9mm Parabellum (9mm Luger) fired from an average pistol travels ABOUT 1200 feet per second.