My friend has a 48" 4x96w kit he's trying to sell. He's asking 250 for it. This is w/o hood though, but still bulbs are almost new and it's a good price.
I got a real nice Coralife setup on ----. You may want to check there. Do a search on there for " Aqualight 48in. " Exactly as I typed it. They run from $89 to $179.