I live in your neck of the woods. I was also looking for a 2009 delivery and kept hearing from dealers that they could not deliver. I did find my x5d but had to check all local dealer inventories within a 50 mile radius on a regular basis to find it. There were at least 8 available new diesels in this area around end of November. So, you will find more if you look more. But since you are looking for adaptive drive, this demo might indeed be the only one in the whole area.

If you purchase the demo, be sure to check out to see if it qualifies for the stimulus package sales tax deduction since it is supposed to only apply to "new" car purchases.

Another minor point is that adaptive drive could slightly reduce the off-road agility of the vehicle but that does not seem to be an area you care about based on your note.

The demo could actually be an even better deal than a brand new car because if it has already run into the usual quality issues, the dealer would have fixed them (hopefully.)

Good luck!