AimToFind.com still offers the iRobot Roomba 532 Pet Series Robot Vacuum for $449.99. Add coupon code "DEAL7" to your cart to cut it to $269.99. With free shipping, that's tied with our mention from a week ago as the lowest total price we've seen by $20. The Roomba 532 features dirt sensors, cliff sensors so you can use it near stairs, a non-marring bumper, and a self-charging home base.