If you are conspiring to circumvent the CA law and smuggle the banned magazines into CA through a third party, you are subject to prosecution. There are also implications with Federal law if the interstate transfer goes into a banned state. In my personal opinion, such an act is both illegal and stupid.
If you are outright selling the magazines to a disinterested third party with no intent to circumvent the CA law, that is a different question.
I have refused some private sales that would have been technically legal if the person had not spilled the beans about his intent to circumvent a law. I don't like anybody enough to get involved in that.