Seller sent me some additional information but is still out of town so I haven't seen it yet. Here's what he said:

"he lights and signals work fine, the driver side headlamp is a bit
dim, but the "brights" aren't super intense so I drive it with the
high beams on. Manual windows (I think a plus), red leather is pretty
good in the back, but if I was going to keep the car I would get some
seat covers for the front. I've never noticed an oil leak and it only
smokes when you fire it up, but after it has been running for 15 min
it doesn't smoke at all. Sometimes when I've pushed it hard, like
going up the hill from Sedona to Flag, I've noticed a plume or two,
but it really runs as clean or cleaner than most diesel pickups. I'm
heading out to camp for the night, but I'll get the interior pics as
soon as I get back. Think about a time next week when you are
available to meet up, I'm happy to meet half way. Thanks for your
interest."

In a previous email he claims no rust. Also claims he can refer me to the previous owner, a diesel mechanic who maintained it well...Hasn't mentioned the AC or the car's history, but if it's an AZ car I'll bet it's equipped. I'm an AZ native and well aware of the elevation and temp. differences between Flagstaff and Phx. I'm about half way in between them, and my temps are much closer to those in Phx. I'd really like AC if possible for a daily driver. My experience with used cars regardless of their make in Flagstaff is that when the AC craps out people tend to forget about it, because Flagstaff only has about 2 weeks of summer anyhow.

He's asking 2900. I readily admit to being clueless about the car's even approximate value if it's in good shape. I missed a rust free 82 300SD with good maintenance records last month at 2600, if that's any clue.