Buy.com has the iRobot Roomba 440 Robotic Vacuum for $149.99 (199.99 – 50 instat savings) for a limited time.

The iRobot Roomba 440 Robotic Vacuum cleans routinely…so you do not have to. It’s powerful vacuum and counter-rotating brushes reach deep into your carpet to remove dust, dirt and pet hair. This entry-level robotic floorvac is easy to use and includes an array of convenient features. Simply press the “clean” button and the unit will vacuum the whole floor, adjusting automatically to any floor surface including wood, tile linoleum, and low-to-medium pile carpet. The Roomba is small enough to even go under the furniture that no upright can do. The vacuum’s artificial intelligence determines the room size and adjusts the run time to ensure that it cleans the entire floor. Integrated sensors detect dirt and will increase the focus and intensity of cleaning in that area, while infra-red cliff sensors in the non-marring bumper detect stairs to keep the unit from falling. This package includes 1 – 440 Roomba; 2 – virtual walls; 1 – power supply; 1 – rechargeable battery; 1 – extra filter; 1 – brush cleaning tool.