Costco offers its members the iRobot Roomba 805 Robotic Vacuum Cleaner in Black for $329.99 with free shipping. (Non-members pay a $19 surcharge.) That's $35 below our April mention, a current best by $147, and the lowest price we've seen. 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 December 24.