These headlights used to run about $1000-1400 from Dave custom angle eye but it only work for cars that doesn't came with factory xenon.
If you have factory xenon you need to swap out your stock projectors beams and self level motors along with D2S HID bulbs.
I used those headlights as i just need new lens covers then transform everything from stock headlights to that new housing and added the EBAY projectors from those headlights for the High beams.

01-03 X5 E53 CLEAR CORNER+HALO PROJECTOR HEADLIGHTS BLK - eBay (item 330511068685 end time Mar-22-11 02:25:47 PDT)
Or buy this then paint the housing flat black.... $5 for the paint and save yourself about $100.
01-03 BMW E53 X5 CCFL HALO PROJECTOR HEADLIGHTS CLEAR - eBay (item 390297454033 end time Mar-21-11 12:55:35 PDT)