Amazon has the iRobot 550 Roomba Vacuum-Cleaning Robot with On-Board Scheduling for $179 with free shipping.
Product Features:
* Vacuum-cleaning robot with on-board scheduling for all floor surfaces
* 2 high-speed, counter-rotating brushes; anti-tangle technology; side brushes
* Gentle-touch bumper; dirt sensor; built-in cliff sensors; self-charging Home Base
* Includes bumper extension, cleaning tool, power adapter, rechargeable battery, 3 extra filters, 2 Virtual Walls, and batteries
* Measures approximately 13 by 13 by 4 inches; 1-year limited warranty
Amazon.com: iRobot 500 Series Roomba Vacuum-Cleaning Robot with On-Board Scheduling: Kitchen & Dining
iRobot 550 Roomba Vacuum-Cleaning Robot with On-Board Scheduling $179 + FS 
