I wouldn't buy a package from any site. You can usually put together the same exact equipment they have in their package for a way less price, and usually better quality stuff too. Just do a little legwork, it doesn't even take that much time or leaving the computer I'd just go to amazon and price the stuff in their package. I mean just a quick search shows.....
http://www.amazon.com/iPower-GLSETX600DHMAC6-600-Watt-Digital-Dimmable/dp/B005GYRZV2/ref=sr_1_5?ie=UTF8&qid=1453214976&sr=8-5&keywords=600w+grow+light - 600w bulb, ballast, air cooled hood, timer, and hangers $170
http://www.amazon.com/VenTech-VT-IF6-CF6-B-Controller/dp/B0051HDECS/ref=sr_1_1?ie=UTF8&qid=1453215035&sr=8-1&keywords=6in+fan+and+carbon+filter - fan, carbon filter, and SPEED CONTROLLER (needed) $140
http://www.amazon.com/iPower-GLDUCT25C-Non-Insulated-Ducting-Aluminum/dp/B008NY6P36/ref=sr_1_3?ie=UTF8&qid=1453215089&sr=8-3&keywords=6+in+ducting - ducting and clamps $18
So this gets you everything that package has PLUS a speed controller for the fan and it's.......only $328, already a $100 in savings. Quantum ballast are not any better that iPower (I have one of each the quantum actually runs way hotter) and all the other intens are the same if not better quality. Like I said that was a really quick search but usually with these package you pay for convenience when it's really not THAT much more convenient to buy from them as opposed to amazon or ebay.
**edit: forgot the grow tent (duh),
http://www.amazon.com/MarsLG-Hydroponic-Non-Toxic-Cabinet-MARS363678/dp/B008007U2S/ref=sr_1_2?ie=UTF8&qid=1453215317&sr=8-2&keywords=3x3+grow+tent - 3x3 grow tent for $80
So it's still $50ish dollars in savings, IMO it is slightly higher quality products too. You also get a speed controller which is $20-30 dollars itself so really it's closer to $80ish in savings.