Having lived in CA you really need to be careful. They will have an overzealous prosecutor that is more than happy to go after you, the seller. Regardless of the outcome.That's fine, and to each their own. Again though, it is fully up to the buyer - not the seller - to know said buyer's state laws. Caveat emptor and all.
While I was there the city of Davis, CA tried to charge anyone who ordered a knife from Cold Steel with a misdemeanor and seize said knives. All this because their prosecutor felt some items they sold were illegal in the state.
We left there in the early 90's. The state of CA tried to tax us on money we had saved and transferred to IN. This after living here a year. They said any money earned and saved in CA was subject to an additional tax after being moved out of the state.
It didn't work. Although we did see a tax lawyer to clear it up.
Don