Welcome, get the one with least mileage and on and have a good look over it before you make an offer. Make sure the head gasket has been done as well. Even better if the previous owner had taken out the five year warranty.
29k from a Ford dealership is about right, you might just might get 1k off if you push hard enough. You must ask to see the service history obviously check the tyre ware have a good look at the seats and steering wheel for ware. Good luck ?