$139 is a good price for about 280w. I retract my "cancel your order" comment. It might be worth the experience for that price (as opposed to a fight with the eBay seller). I didn't notice the price when I posted. I was thinking it was the typical $220 or so I recall seeing.
I don't even see it on their web site. It looks like they've changed their cases and this is a closeout of the prior model. So, that might be worth the experience.
The only thing I like about MarsHydro is that they have a support forum on 420mag. I think having some public visibility to resolve a problem is a huge asset compared to buying from less-known eBay and Amazon sellers. A lot of those guys (JoyHydroGrow comes to mind) are scammers. They sell you stuff at an incredibly low price like you're getting, then you find it doesn't put out the power they claimed, and they require you to send it back to China (for twice what it costs) "or, we'll give you a 10% refund and you can keep the light."
On a different note: their MarsHydro's website is incredibly annoying. It's like a slow teevee show. (Try scrolling with your mouse wheel. Whoever designed that site doesn't intend to use it themselves. I better shut up. I'm starting to have my wiki reaction.
).