Think about the practical side of private sale background checks.
Let’s say I have a .22 rifle to sale which obviously is used. I find a co-worker who wishes to buy the gun and we agree on a price of $175. We trot down to the local gun shop to have the background check run and they charge us $40 for the service. Who pays this?
I know if sounds simply enough, but the devil is always in the details and really how many criminals are going to do this anyway.
A major source of objection to a free economy is precisely that it ... gives people what they want instead of what a particular group thinks they ought to want. Underlying most arguments against the free market is a lack of belief in freedom itself.
- Milton Friedman