45
M1911 .45 cal
$500.00 is a good price.
I don't know if it's the smallest, but the Kahr P45 is pretty small.
It depends on several factors, and it is too broad of a question to answer.
10 USD
If your question is can citizens of the US own a .45 cal handgun, the answer is yes. MOST of the US does not require a permit to own a firearm, and even the areas that DO require permits do not ban the .45. In some countries private citizens may not own a handgun in a military caliber, but the US does not follow that practice.
are you asking the value of a 'single' 45 cal. cartridge or the value of a 45 cal pistol/revolver ???? If a weapon, for value, you would have to declare the overall condition of the weapon, maker, model and serial number........................
Dikar Spain-45 Cal black powder only
100-500
value depends on overall condition.....................
100 or so