ussually between 300-800 dollars depending on the shop that paints them for you, and if they have to blend them into the paint on the car. Blending them makes them look better, as the possibilty of the paint not being the right shade is narrowed.
I spent over 2,000 all said and done. Of course I had it painted up to the trim line because the Xenon kit goes up that far and I also had the trunk lid painted with a the spoiler. The price included installation. The guy I took it to was a pro and painted custom motorcyle parts for a local harley dealer. It will probably cost a grand