Selling my 20" current usa Nova Extreme Pro T5HO fixture. Its 6x18w fixture. One of the ballasts (part number: T5120-218HO) needs to be replaced and can be purchased easily from SunPark Electronics for 19 bucks. I have talked to them via email and phone. I have a 150w MH already and so I don't really need to fix the T5 fixture myself . It would be a pretty easy fix if you are interested and when I was using the light, my corals were growing great (montis, zoos, etc.). New bulbs are available on various online sites including Marine Depot. I am looking for 100 bucks (new is 320 bucks).
Bulbs:
http://www.marinedepot.com/Current_USA_T5HO_TruLumen_Bulb_T5_High_Output_Fluorescent_Light_Bulbs_for_Aquariums-Current_USA-CU02300-FILTBUT5HO-vi.html
Ballast: (I recommend calling or email)
http://www.sunparkelectronics.com/contact_us.php
Thanks for looking!