I'm in Serbia, and the cards look genuine, I've already registered it at ASUS website. And the dealer is genuine for sure, the biggest retailer in Serbia, and has a small shop for enthusiast and I'm a vip member there so I here of these hot deals early. There are often just several cards at this price and they are reserved in a few hours. I guess they are pretty old, haven't been sold in time and are imported from abroad. For example, on the box of the d2 there is 2007 written, so I guess a dealer just wants to get rid of them somehow.
Anyway, I would probably use the card for hq audio and mkv and blue ray videos, at first with my headphones (I broke them last night grrrrr), and then as stereo. Hopefully, I would get to 5.1 sometime next year, and get a HD TV late next year or in 2012.
So, any opinions are welcome