By the way, what is the meaning of "bstock"?
When i see this headphone in this website, i am confused. Is a good deal for that? I am on the fence.
I think they're legit. If they are, 90 day warranty for a refurbished item. You can call Sennheiser and see if they are authorized. Personally, I'd buy a used one from the For Sale thread from a headfier who has good feedback first; of course, buy one that was originally from an authorized dealer and in great condition.
You can buy them new for $299 from www.razordogaudio.com w/ coupon code RAZORDOG100.