epdarks suggestion brings up a another point. If you really want a 4.6 I would look country wide. Shipping when you wait for a load coming your way is not THAT expensive and you can have someone locally do a thorough check of the vehicle. You could also focus on the sunbelt and find an X that has never gone through a winter of treated roads.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas