You can actually get some pretty quality handguns in some Walmarts, and Fred Meyer for that matter. And yes, background checks are required for most purchases. But not for private purchases or gun shows in most states. Doesn't need to be the "black market".

and yes, I do own 4 handguns, 2 shotguns (for trap), and .30-06 for moose hunting, and have a concealed carry permit.