$300 hundred???
They slide in just like the Halogens, 5 minutes installation.
You have to manually adjust the height of the light into a fixed
position with a metric hex wrench or something. That's it..
The $300 couldn't have been for autoleveling because that can
only be done at the factory, its not possible as a hack.
I think the added harness for the Litronics (which I didn't install)
is so that when you switch on the high beams you keep both your
low and high beams on at the same time. That's not worth $300