>Old Soviet style taxation and regulation tries to hang on but is undercut by unregulated and untaxed black market which can easily be found by asking a local. In the US there isn't that kind of social cohesion, at best you'll have people assuming you're an undercover cop trying to bust unapproved garage sales, at worst you'll be lead to an ambush by non-whites who are just out for blood, and any sort of unofficial store would have people talking about it on phones and online, the police would be there before your first customer, if more than a couple people in the country were caught trying to run unregulated stores then there would be a war on illegal shopping that would make the alcohol prohibition a minor footnote in the history books.