Adorama via eBay offers the iRobot Roomba 980 Robot Vacuum
with free shipping
. That's the lowest total price we could find by $99. Features include an AeroForce cleaning system with Carpet Boost to increase power on carpets, AeroForce high-efficiency filter which purports to capture 99% of allergens, pollen, and particles, and iRobot Home app for scheduling. It includes a home base charging station, rechargeable battery, two dual mode virtual wall barriers, line cord, and extra side brush.