How are they going to stop you from buying and selling without a mark, if they can't track what you buy and sell? All of our information is being stored in files in what the gov. calls the, "National Instant Criminal Background Check System". (NICS).
It is the same thing that JEHoover used to do to people he didn't like. It was unconstitutional then and still is. And yet, here we are. A dossier on every one of us. The Supreme Court is nothing more than a useful way to relieve of us our rights, not protect them.