This is an interesting paragraph from Minnewaska's link :
"For a purchaser to qualify for the exemption from use tax, title (ownership) and possession of the vehicle or vessel must transfer to the purchaser outside of California. When a purchaser exercises control over the vehicle or vessel in California prior to the planned out-of-state delivery, ownership transfers to the purchaser in California. Therefore, if any person other than the seller, or an agent acting on behalf of the seller, delivers the vehicle or vessel from California to the purchaser at an out-of-state location, ownership transfers to the purchaser in California, and California use tax applies. For example, if a purchaser asks a friend or hires a common carrier to deliver the pr
operty from California to him or herself at an out-of-state location, use tax applies."
It seems you can't even hire a delivery crew.