If you want to buy a gun, treat every gun as if it is loaded.
If you want to sell your gun at a gun show, you should make your gun unloaded for safety of the other people.
Never point a gun anyone, always keep your finger off the trigger and never dry fire a gun without permission. Do not forget to remember that the most important rule of a gun show is safety.Each state in United States has its own laws that pertain to the buying and selling of guns.
You can buy your gun product from the dealers and also from the individuals. A dealer should do a background check when he sells a gun.
When buying from an individual, you should be carefull about background check and age requirements will be based on state laws instead of federal law. Remember, the bottom line is that all laws apply inside a gun show. Also there are certain rules of safety.