400W HPS,400W MH, switchable ballast and hood for $500?

I have a buddy who has 2 bulbs (400W Hps/Mh) and a ballast that can handle both bulbs(at different times) he told me he paid 6 and I was thinking of offering him 5. He only used it for one plant this year at the end of the season due to early frost ETC.

you can get a new one from htg supply for 169$

http://www.htgsupply.com/viewproduct.asp?productID=47981