Amazon has the iRobot Roomba 614 Vacuum Cleaning Robot, model no. R614020, for $224.99 (regularly $299.99) with Free Shipping for a limited time. Best Buy and Target also have it for the same price with Free Shipping for a limited time.
The Roomba 614 Vacuum Cleaning Robot provides a thorough clean, all at the push of a button. The patented, 3-Stage Cleaning System easily picks up dust, pet hair and large debris like cereal. The Lithium-Ion battery helps your robot go the distance, providing up to 3x the battery cycle lifetime. Roomba works on all floor types, and at just 3.6 inches tall, is specifically designed to fit under most furniture, beds, and kickboards.