From their about-us page.
"Directly linked with over 100 factories in China, this is your avenue to steal a bargain right on the shop floor of a factory."
More like they're stealing from you while you think you're getting a bargain. They do claim to offer a money-back guarantee, and accept paypal, so you could dispute it.
Also, since the 7509's aren't made in China (they're made in thailand?), and they supposedly deal with factories in china, do the math. What I've found when dealing with chinese sites (focalprice, dealextreme, kaidomain, etc...) is that, if the ad doesn't say "genuine" somewhere, and the price is less than OEM refurbished, they are usually fake.
I also find it extremely funny that the 7509's are $38.99, while the garbage can MDR-V150's are $35.99. They are $20 at Wal-Mart.