IMO 30K miles on an '11 is a red flag. What are the other details on it like---is this at a BMW dealer or non-BMW ? Have you have had the service records pulled ? Need to look at all the details besides just engine pics. My $.02.

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2008 X5 4.8
Jet Black/Black Nevada/Dark Burl Walnut
Adaptive Drive
Premium Pack
Tech Pack
Climate Pack
Sport Pack
20" Wheel Option
Premium Sound
Sirius Satellite
Rear DVD Entertainment
Multi-Contour Seats
Comfort Access
3rd Row Seat
Heated Front Seats
Running Boards
3M VentureShield Paint Protection Film