A CPO should not have a $6K-$8K premium over non-CPO. I would keep looking for a better deal. And a majority under the CPO process put 4 new tires on it--which is at least a $1K - $2K (depending on what tire size) value put in the CPO. I bought mine off of a 2 year lease in L.A. with only 16K miles on it--they replaced all the Dunlops which costs usually $2,500. Plus you get the warranty through BMW.

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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