Advice on buying a 1999 Ford Expedition with 30k miles

I am looking at a 1999 Ford Expedition with 30k miles, but I’ve never purchased a car this old before and I wanted some advice on whether it’s worth it. I want something that can haul people around, drive well in the snow, and that I don’t have to worry about scratches and dings.

  1. They are asking $6k, but the KBB value is $3600, so I can probably get them down to 4-5 grand. Is that a decent deal, if the car is really good condition?

  2. What do I need to inspect on the car before purchasing? i.e. what could have deteriorated after 2 decades of garage and little use that I need to be cautious of.

  3. Can lots of mechanics work on this car, or is it going to be expensive to fix?

Anything else I should think about?

Thanks, all!