Amazon.com has a Refurbished iRobot Roomba 4100 Intelligent Floorvac Robotic Vacuum for $69.99 with Free Shipping.
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- Rechargeable APS battery, 7-hour charger, 1 virtual wall, and 3 air filters included n
- Measures approximately 13 by 4 inches; 1-year warranty n
- Entry-level robotic floorvac with dirt detection and infra-red cliff sensors n
- Auto adjusts to any floor surface; 2-hour continuous cleaning; easy-to-empty debris bin n
- Edge-cleaning sidebrush; stasis sensor; virtual wall for confining to designated area