Kohl's offers the iRobot Roomba 761 Robotic Vacuum, model no. R761020, for $499.99. Coupon code "SUPERSAVER" cuts that to $399.99. Plus, you'll bag $70 in Kohl's Cash. (The Kohl's Cash can be used on purchases from September 15 to 25.) With free shipping and assuming you'll use the credit, that's the lowest total price we could find by $99. It covers 300-square feet per cleaning cycle and automatically adjusts to different floor types. Deal ends September 19.