Anyone selling a Arizona hybrid plate?

This would be illegal.

No new plates are being issued because the program is full. Registered owners can transfer a plate ONLY to to another qualifying vehicle THAT THEY OWN.

From the regulations:

Customers with a prior qualifying (Honda Civic Hybrid, Honda Insight and Toyota Prius) vehicle that is currently registered with an Energy Efficient plate will be allowed to continue using their plate until they sell/transfer the vehicle. The Energy Efficient plate may only be transferred to a qualifying plug-in hybrid electric vehicle that is owned or leased by the same registered owner. Otherwise, the owner must surrender the license plate to any MVD or Authorized Third Party (ATP) office.