LA is full of illegal dispensaries. I have no doubt that they sell illegal carts.
But actual regulated dispensaries are not, it would be too easy for them to get caught.
During the last scandal around tainted vape carts, they did not trace a single one back to an actual dispensary, but did trace a number to illicit dispensaries in LA.
It is worth noting though that LA has a staggering number of unlicensed/illegal dispensaries. This article puts 4 in 5 as illegal in LA area [0]. This is not true of NorCal.
