Yes. With the exception of some people that hold permits and licenses that show they ALREADY had a background check, it is required when buying a gun from a dealer in ALL states. Including shotguns.
That depends entirely on where you are, and what you want to do. In the US, on a Federal level, there are permits/ licenses to be a dealer in guns, an importer, manufacturer, collector, dealer or manufacturer of machine guns, etc. Some states require a permit to purchase a gun or possess a gun, and a different permit to carry a gun, or carry a gun concealed.
There is no such thing as a gun license in the US. There are concealed carry permits/licenses and dealers licenses.
It depends on where you are.
A dealer at a gun show is a licenced FFL dealer, the same as any dealer who owns a gun shop with a store front.
Gun Dealer happened in 1990.
Gun Dealer was created in 1990.
Texas.
yes
A dealer at a gun show is a licenced FFL dealer, the same as any dealer who owns a gun shop with a store front.
You do not need licenses for airsoft guns, as they are not firearms.
States have nothing to do with an auction choosing to be a dealer only auction or a public auction. Thus there is no state that "requires" a dealer licenses to buy at an auction. This a requirement of the auction if it chooses to be dealer only.