Answer:
Seriously, can you not pick up the phone and ask your local tire shop? Geez, shop apround. Shouldn't be more than 70 bones.
Actually an X5 alignment is $800 at a BMW dealership according to the estimate I have from 4/08/10. The X5 has a double ball suspension, and a steering angle sensor and associated DSC/ABS modules that complicate it, BUT 8 bills is ridiculous, find and indie shop and it should cost about half that.