[Maricopa]

Absotively not legal. I wanted a vintage AZ copper/green plate and bought an old one ('73) on eBay. Others have bought vintage plates from the year of registration ('65, which were light blue and white) and been able to have their reg. switched to use that plate but you can only use one from the correct year, not a later one as I wanted to do. I talked this over with the DMV folks in person when I renewed my drivers lic.

Randy has been lucky and maybe the cops here aren't as hardcore about it as the ones in CA but a FFCobra poster got nailed there for the same thing. In his case they only took the plate and left it to him to get the car home.