I dropped off my F30 for a well deserved suspension "upgrade", and labor costs were:
LABOR FOR REPLACING FRONT STRUTS/SPRINGS,
FRONT SWAY BAR PLUS REAR SHOCKS, SPRINGS
AND REAR SWAY BAR (REQUESTING LABOR
Apparently, the suspension on the F30 is rather intricate and intimately tied together...20-21 hours to upgrade everything.
So $4000 (including parts) is a bit...too rich for my tastes. I guess I'll just install front and rear sway bards/strut tower braces to tighten things up and replace shocks/struts when I need them in 100k miles.