Yeah might be 3rd party. Looking at the one sitting right beside me, it's missing the Wii logo on the front center, and the b-a buttons are clear instead of white. But otherwise it does look identical, even to the screws on the back. I dunno.
I thought maybe the old classics dropped in price since the pro ones are 19.99 now. But I can't believe it dropped to 9.99, which is what that says the list price is...