Unfortunately I think any X with that kind of mileage would be out of my budget (~$10K), but, I've been trying to find a low mileage one to test drive just for comparison's sake. The history on the 148K one is going to be limited to whatever I can get from the local BMW dealers---it's a two owner car that has been in this area its entire life and was serviced by at least one of the BMW dealers here. I know how important maintenance is on BMWs, but I think as long as it checks out with a PPI I'm comfortable with it not having all the maintenance records.