Good Guys Electronics offers the iRobot Roomba 980 WiFi Robot Vacuum for $799.99 with free shipping. That's $20 under our mention from three days ago and the lowest price we could find now, also by $20. (Most stores charge $899 or more, however.) Features include an AeroForce cleaning system with Carpet Boost to increase power on carpets, AeroForce high-efficiency filter, and iRobot Home app for scheduling. Deal ends October 7.