04 Navigator anything I should look for?

Im considering buying an 04 Navigator. Its a 1 owner, clean Carfax. 75k miles for $9k. I haven't seen it in person yet but will go later this week. Is there anything I should know about this year and model? Do the rockers rust out like the Expeditions? Is this a decent year? What were the major problems of this year? Does this seem like an ok deal? Thanks in advance :smokin: