Probably you can. Some states will charge sales tax up front at the dealers lot, Ca is one of them. Though you can ask dealer to tow it to Az border for a few hundred bucks and sign a delivery there. Then you need to get a US address and register it there. I didn't know how, and didn't have time, so did it through one of Montana LLC, got my plates by Fedex in a few days, setup fees were steep but annual renewal is cheap. I think LLC are good for people with VERY expensive rigs, because you don't pay any sales tax. Otherwise, setup fees are high.
