[Kanedaa]

Can anyone verify if these are authentic? If so, really good deal - I'll probably buy because I don't think Ultrasones are popular enough to drive a fake Chinese knock off?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=321335387287

 

[Kanedaa]

Can any subject experts chime in on this? 

 

[viralcow]

As far as I know there's no fake Pro900's floating around. But also, there's nothing suspicious about that price. I've seen Pro900's sell for $300 all the time.

 

[Dk0987654321]

Well, I am using Pro 900s and from the pictures they are the same, the packaging is all correct and the contents and packing inside the case is the same as the one I received. The seller has plenty of feedback for you to look at, I would say that these are a real pair. 
On a side note I have yet to see or hear of any fakes.