Post it on the EE here and specify that you are looking for local pick up only. I would put "AZ" in the subject of the post line also.
Then it will/should be listed in the local AZ sales forum too (you dont have request or do anything to get it on the local AZ page, it happens automatically, or the Mods do it-not exactly sure but I will/should happen)
eta- I would rather deal with arf guys than what you might get on backpage. You could always use BP as your last resort, if you dont get any interest here