i saw one on passport bmw lot priced at $48K, 10K miles, and that is the listing price you expect they go down to $45K or less. so if you got it at $42K at auction, thats an ok deal. the truth is dealership buy cars at auction average $10K less than listing price. if passportbmw has it at $48K, they likely bought it @ $38K at auction.

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2002 X5 3.0 Siena Red
Premium, Cold Weather, Rear Climate Packages, 19" Wheels
Aluminum Running Boards, Clear Tail Lights, Clear Side Markers
Titanium Kidney Grills, Titanium Trunk Lid, Xenon Headlights
4.6is X5 exhausts, 35% Tint, Aluminum Pedals
2005 530I Mystic Blue
Premium Package, Sport Package, Xenon Headlights
18" Sport Wheels, 35% Tint all around
Mods to come: M-Tech Front Bumper, M5 Side Skirts, M5 Rear Bumper
Quad Exhausts, Style 172 19" Wheels