GameStop offers the used Microsoft Kinect Sensor for Xbox One for $29.99. Coupon code "SAVER" bags free shipping. That's the best deal we've ever seen for a standalone Kinect sensor; it's also $60 below the lowest price we could find for a new one. It features a 1080p HD camera and allows for movement- and voice-based control of your TV and Xbox One console, Skype calls, live game broadcasting, and automatic sign-in.
No warranty information is provided.