Received mine yesterday. The reason it's far cheaper than the $40 going rate is because it's being direct shipped to you from Hong Kong. Direct from the source. No state side middleman. You'll see that (International postage markings) when you receive yours. I haven't installed mine yet but it looks to be an original Wiikey from all the pictures I've compared it too.
It took a full 10-12 days to get here from there but at $11 bucks shipped, it's the best deal going. Whoever still pays $40 for one of these just to get it from a U.S distributer really is foolish.... and whoever is getting people to buy them at that price is making an absolute killing!