Thanks for the comments. It's a higher mileage FJ, 2014 with more than 120k miles. That means it's been driven almost 60 miles a day on average. Judging by the photos, those must have all been on clean interstates far far away from any snow/salt. Single owner, serviced by the original dealer, and also being sold by the same dealer again which I like.
Service records show oil changes every 5-6k, but I can't see anything in the records about other fluids (diffs, transfer case). But all the regular service intervals were performed.
I have a deposit down and headed for a test drive this weekend. I'm going to listen carefully for TOB chirping. Also going to test out the HI/LO 4wd and locking diff to make sure everything is in good order... Those may not have been used in a long time if at all if my Interstate Cruiser guess is right.
Anything else to look out for specifically?