i've never ordered thru cool touch on ebay, but the prices on the retros kits are pretty good. i think dual 400 watt ballast/disconnect cords/sockets for $165.00 + shipping isn't bad at all. just buy your bulbs thru hellolights. never mentioned what size tank your trying to light up, but their not much price difference between 175, 250, or 400 watt. get something you won't have to upgrade to at a later date. sooner or later people alsways tend to upgrade their 175 watters unless you have a sm. tank.

ray