It's a great PC fixture. I owned the Dual 36" on my 46g bow. If you're going to get PC - it's a nice fixture. You can get it brand new for $223 at Marine & Reef.
You need to understand that if this particular fixture needs bulbs to be replaced - you are better off spending the extra $100 and get a new one with new bulbs.
Of course, with that said - you can get a new 48" Current Nova Extreme 4x54w T5 fixture for $227 at Marine & Reef. Of course, this would be much better!! It's not the Pro version with individual reflectors - but those cost over $300.
Hope this helps.
EDIT: Apparently Current has redesigned the Nova Extreme to include individually contoured reflectors. Dude - for $227 you can't beat a 4x54w T5 fixture that is 48" long. I would seriously look into this light for $100 more than you were willing to spend previously. Free shipping included as well.