LOL, those prices are ridiculous! The Xenon projectors on my BMW are literally half
I haven't read this whole thread, but one thing to consider if no one has mentioned it is that these headlights likely won't be "plug and play" anyway. You'll probably need a control module of some sort, as well as sensors throughout the car. My BMW uses the steering angle sensor as well as several leveling sensors throughout the suspension to aim the beam properly. It may be impossible to do the conversion without dealer support (if coding is involved) which I suspect would not be forthcoming.