For the diyers' it is about 100USD.

Check the following site.
http://www.gpopshop.com/garrettt2kits.html

However, you have to make sure because nobody has yet make a rebuild kit for ball bearing turbos. If you have a ball bearing unit, you are out of luck. Rebuilding a turbo is nothing more than take it apart, clean everything up, replace seals, and put it back in order. If you ask a shop to do it, it will cost around 400USD

http://www.gpopshop.com/rebuilding.html