Transmission fluid. Check it warm and wipe with a cloth that allows you to check color. The farther away you are from red the older it is. And smell it. It should smell 'sweet', not burnt.

Also tran-related, if you have a chance to start it cold, see how it goes into reverse. Looking and listening for a nice smooth transition into gear, not a clunk, and not more than a few seconds searching. And then from R to D.

Auxiliary fans are a bugger too. With the A/C on both of them should be working.

Go for it. With than kind of mileage it's hardly broken in.