Re: Out of State Delivery
I don't know the specifics about CA (although I seem to remember reading that they increased the time to 6 months or possibly even a year). However, if you make a purchase in any state, you are liable for Sales Tax. Some states have a reduced rate for some purchases (like a motorhome) and some states may have an extra (luxury) tax on the sale. Then when you go to register it, the whichever state you do this in may charge a flat rate, an amount based on weight, or an amount based on value.
So, if you arrange the sale in one state, but take delivery in another, you may be able to avoid the first state's sales tax, and possibly the second state's as well. However, when you go to register it anywhere, they may try to recoup the missed taxes. It's a tricky situation, since most every state knows about this method of avoiding taxes, and most take a very dim view of it. One possible alternative is having a 'corporation' buy it and register it in a state which is corporation friendly. I think South Dakota is advertising this.
But read all the fine print on what you must do and what you cannot do in this situation. If not, any state which can zap you, probably will. And I suspect many states will make it unpleasant for you to reside in the state with a vehicle registered in another.