Stirring up a hornets nest

Trading license plates and plate holders is a big hobby at car shows, and they are cheap to mail.

CA owners put a premium on those old yellow-on-black license plates. CA must have started update decals long ago since drivers still used the old plates until today. The state finally wised up and now offers the old colors for ~$50 premium. When I lived in other states, I recall tossing old plates in the 1960-70's because they didn't do decals then. Don't know if even legal to drive today on old plates in those states. States kind of swamped the system with all the special plates for universities, manatees, historic, ...