I think it would really depend on how the owner took care of the car. I would recommend you taking the car to a mechanic to check it out and ask him if he has any paperwork for previous work on the car
Good luck man..
2006 330i Steptronic/Alpine White/Black Leather/Burl Walnut Trim/Premium Package/iDrive/Heated Seats/Winter: STYLE 159 Blizzak LM-22 RFT/Summer: TBD
2004 X5 Steptronic/Alpine White/Grey Leather/Poplar Trim/Premium Package/Heated Seats/iPod Adapter