It ABSOLUTELY is that easy. There's no law in a state that says you can't buy a gun in another state then transport it into your home state.<quoted text>
I'm not sure about the laws in other states but even buying a gun at a gun show requires at least a three day waiting period. I don't think it's as easy to jump across the border and buy a gun as it is to jump across and buy a pack of cigarettes.
And you're wrong about gun shows. Private parties can sell guns at gun shows and if selling guns isn't their business but just a hobby or interest, they are exempt from federal gun laws. No background check, no waiting period.