Factory Authorized Outlet via eBay offers the iRobot Roomba 650 Robotic Vacuum Cleaner, model no. R650020, for an in-cart price of $279.99 with free shipping. That's $20 under our mention from September and the best outright price we've seen. (It's a current low by $50.) The vacuum features a 3-stage cleaning system, virtual wall, and on-board scheduling.