I bought from this guy, hqz4321@gmail.com, his ebay user name is hqz4321. I paid $55 each set ( I did hi's, low's, and fogs ) plus $10 each set extra shipping to Canada. USD.
I got the 6000K and I'm happy with them, but the 4300K has the most light output and clearest color. Mine have a slight bluish color.
Apparently 90% of the HID kits out there are made in the same factory, and you can pay $40 or $400 for the same kit. The only way to get true real high quality ones is to piece together a set from OEM parts such as Philips from a Lexus, BMW, etc.
You'll want to disable your auto headlights function to prevent the HID's from cycling on then off then on when you start the vehicle. That is very hard on the lights and will cause premature failure.