Word man, I actually found a bunch of 400 watt MH warehouse (high, and low bay) for FREE. a local warehouse posted come get em, and boy did I
. The ballasts I keep finding are these:
http://www.warehouse-lighting.com/Images/products/Medium/400hitek.jpg
I also started my first grow with 1 I found for 25$ on craigs list for 25$. At the time I knew nothing of electricity, butnthey really are very easy to wire up. Just 3 wires... Anyways combine the white ballasts with 1 of these 52$ cool tube reflectors and you have yourself a professional grow setup for little to no jack!
http://www.accessdiscounts.com/ad50028.html