Costco offers its members the iRobot Roomba 805 Robotic Vacuum Cleaner in Black for $364.99 with free shipping. (Non-members pay a $20 surcharge.) That's the lowest price we could find by $90. This 3.6"-tall vacuum features a 3-stage cleaning system, spinning side brush, iAdapt navigation, two dual-mode virtual wall barriers, automatic floor type adjustment, 7-day scheduling, and self-charging. It comes with an extra filter. Deal ends May 7.