Originally Posted by RETLT
Thank you everyone for your input, although I'm probably more confused about it than ever! I may buy it half and half with the in-laws, who live in AZ. That way, we could legally register it in AZ, from what I can decipher from some of your answers. We may even park it at their house part of the time to make sure we're legal.
Congratulations ! I don't know about the difference in the rates but in addition to the registration fees Arizona also has an annual excise tax that is based upon the value of the vehicle so that may not help you.
Arizona does not collect additional sales tax on vehicles purchased from private owners however. Sales tax is only paid if you buy a vehicle from a dealer.