That listing has been gone for 90 daysLook on E-bay, their is all kinds of kits available. Also their are new ballast out now that are switchable 400/600 etc. for around $275
If you just want a 400 kit, they are anywhere from $175 and up,
Here is a link to get you into one I am looking at. From there just click grow lights up to your right, and you will find more kits and set ups then you could even look at.