Depends on the gun. As low as $50, as high as $50,000. Most are between $150 and $600.
Depends on where you are in the US. In most of the US, no license is required.
not that expensive about 10-20 dollars depending on qualityNot very much depends on the quality normally less than $10.
A DeWalt nail gun typically costs between $80 and $200. You can find models that are slightly cheaper and more expensive. You can purchase these items at the Amazon website.
depends on which gun.
DLX, the makers of the LUXE.
For a Browning M1919A4 in excellent condition, with the tripod and all the accessories, the average cost would be around $15000. The most expensive part would be finding the 30 caliber ammunition for it. Both can be found with online searches, or your local gun shop may be able to help locate a seller or buyer.
Cost will change depending on how much work is done, or how much of the gun is painted. Typical cost of a simple 2 color fade over a full gun is around $250-300
$200 for a BB gun
DLX, the makers of the LUXE.
In excess of 8K
We need to know which gun. Prices vary.