When I moved to Rhode Island, I didn't see many of these. Coming back to California, I've realized how characteristic they are of this time of year in the suburbs. Like (probably) most suburban Californian children, I would go to these stands on the 3rd of 4th with my dad who I would then attempt to talk into getting the biggest pack of fireworks available for us to set off with whichever relatives we were visiting that year.
I came across this particular stand at the back of a massive Walmart parking lot in your typical massive stucco strip mall; a classic TNT booth location.
Happy 4th of July.