Newegg via eBay offers the iRobot Roomba 790 Bagless Vacuum Cleaning Robot, model no. R790020, for $429.99 with free shipping. That's the lowest total price we could find by $90, although it was $30 less in December. Features include dual HEPA Air Filters, 3-stage cleaning system, wireless command center, and on-board scheduling. Deal ends March 4.