The figure quoted is only for the parts required to activate the bixenon shutters. Obviously the lights are substantially more.
So far this is what I have spent to retrofit the lights:
Left side bixenon: $250, eBay
Right side bixenon: $200, eBay
Plugs, wiring, relays: $30 Circle BMW
Autolevel sensors/brackets: $162 Circle BMW
Coding: $43 Daniels BMW
Old Speckled Hen Ale $34 Shangys Beer Heaven
I bought a used Bixenon LCM just in case, (eBay, $35), I'll probably just relist that as I ended up not needing it.