at the very least it would prompt citizens to be more RESPONSIBLE about who they sell to, and about what they are selling. It would also shift the responsibility to the licensed FFL dealers, which should be handling all firearm transactions anyway.

FUN FACT:
Adventure Outdoors takes trade ins of used guns. They then resell those used guns. When you buy a used gun from AO, you must fill out 4473 and a background check same as buying a NEW gun. are you guys against that business practice?