I wouldn't be so fast to run from a rental. Not an X but my parents unknowingly (found the Avis sticker by the gas cap) bought a 93 Prism with 60k on it. I drove it when it had 150k on the ticker and the it still ran like new. One thing about rentals, they probably stay on top of regular maintenance regardless of how it was treated as a rental.

That being said, if the price is right (with an extended warranty), go for it.