As far as I'm aware (and I'm open to correction on this) the gun vendors themselves decided to stop selling firearms, which itself demonstrates that a self-regulated market works! Despite the potential sales and money to be made, perhaps they decided that SR stood for something bigger than them. Or perhaps they realised that there'd be a lot of people who would try various scams / slander in order to get them off the site, who-knows?! Real government has a lot to learn from SR, but then if we were to self-regulate in reality, what would we need to pay outrageously expensive politicians for!