Thanks LeMansX5. Base is less expensive. Didn't do the calculations but by glancing at it, it looks like overall the car is less expensive than previous years (though some options got a slight price increase).

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2008 X5 4.8
White w/ Black Interior w/ Bamboo Trim | Premium | Sports + 214" | Tech | Cold Weather | Rear Climate | Premium Sound | Active Vent Seats | Heads-Up | Comfort Access | 3rd Row | Aero Kit | Huper Optik Tint | Clear Reflectors