Just doing my daily Craigslist seach and saw this '75 Overlander on the Phoenix Craigslist, is this the one you're looking at? It looks like it's decent, though maybe a bit on the pricey side at $6500.
1975 Airstream Land Yacht 27'
There's another one on Phoenix Craigslist from a few days earlier, a '65 Overlander. The price is lower at $2K but looks like it needs a lot more work. I really like these mid 60s Overlanders.
1965 Overlander Airstream
And here's a '69 Overlander from a couple days before that, not sure if it's still available or not:
Airstream 69 26' Overlander
Heck, if I lived in Phoenix, my search would be DONE by now!