Well, I for one am all for background checks on all purchases at gun shows, but since I don't have access to do background checks for a private sale, I have a problem with regulating outside of that. Unless they have a web interface that allows you to do a quick check without having the FFL license, no way. Not that I sell a lot of firearms(in fact I still own nearly every firearm I have ever purchased) but IF I decide to sell my old 30-06 to someone else, I would like the ability to do so without dragging myself down to the gun dealer, waiting in the long line for them to do an NICS check on all the other guys selling the right way(while criminals will simply take money to "lose" their firearm). Keep in mind Lanza actually couldn't get a firearm. So he stole one.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." Thomas Jefferson