Not sure you want to know.......I think it was like $400, but depending where you get the rack from, and who installs it, makes a big difference. then you NEED an alignment after. It hink it;s about 3-4 hours labor, and the cost of a Remanufactured rack.
$184 at Autozone:
http://www.autozone.com/R,2211316/ve...ductDetail.htm
As for DIY, I do almost all my own work, and even write DIY's on this forum, and I still had my mechanic install it. You really need a lift, or else it's just awful.
Take a look under the car and see where the fluid is leaking from (After the snow melts thats abotu to hit us). Turn the wheel all the way to one side, and see if you can trace the leak. Wait till there is snow on the ground, so you can park it, and see EXACTLY where it is dripping from, to make the leak easier to trace.