I have started looking at buying a BMW 135i, which then led me to look at KBB for my cars worth:
157,XXX miles (62,000 when I bought it in July 2012)
Good condition
2004 Limited 6spd grey
$2500-2900 for a private sale
$1000-2900 for a trade-in

I will keep my Xf as my daily after seeing these figures, and just run it to the ground, plus I love the car to death and its very good in winter with winter tires.
Then, when the engine dies, it will become electrified.

The 135i will be me baby/garage queen/only sunny days car.