Just a second thought regarding service history. Hopefully the owner has kept copies of everything, that would be ideal. Or if you end up looking at the service records at some shop (assuming they'll let you look at them; with the present owners approval you should be able to). If you're looking through them, and seems like it's mostly like this: "oil change, oil change, tires, brakes, oil change, maintenance service, oil change, brake flush", that's fine, if the pile of repair orders is 2" thick and it's all like that, you've got a keeper!
If on the other hand it's more like this: "oil change, engine runs rough, oil change, steering pulls left, oil leak, oil change, transmission shift hard" things like that, the guy might be looking to bail out on the car because of having problems all the time. Seems like some cars are just like that, "Monday cars" or something, always little (or big) problems.

Gilly