The one on E-bay looks shady to me. I'd assume its wired since its based off the regular GCN controller. The buttons should be blue though, just to make the match the Wii. But I guess if you to want coordinate, why not?
The Thrustmaster looks more reliable. I believe they are a name brand when it comes to gamepads, so I'd stake my money on them. It'd be nice if someone *cough*NWR staff*cough* could get their hands on it and give us a review.