Dell Small Business offers the Tobii Eye Tracker 4C Gaming Peripheral for Windows for $109.99 with free shipping. That's tied with last week's mention and the best deal we could find today by $39. This device provides simultaneous head and eye tracking to provide a complementary input to keyboards, mice, and gamepads when playing PC games, thus providing a more immersive experience by actions such as controlling the camera angle in FPS games. Click here for a list of current compatible games and here for a user video.