Newegg offers the refurbished iRobot Roomba 650 Robotic Vacuum Cleaner for $219.99 with free shipping. That's $10 under our February refurb mention and the lowest price we've seen in any condition. (It's $10 under the best deal we could find for a refurb today.) This 3.6"-tall vacuum features a 3-stage cleaning system, iAdapt Navigation, virtual wall technology, object avoidance, 10-1/2" cleaning path, and on-board scheduling.
Note: A 1-year warranty applies, but it's unclear who backs it.