If you don’t need a robot vacuum that can sweep your baseboards or empty its own bin, theis on sale at Amazon and Walmart for $139.99 ($140 off), which is one of its better prices to date. The entry-level robovac isn’t the smartest option available, but it’s at least aware enough not to bump into walls or tumble over stairs. The 11S Max offers good carpet and hard surface cleaning with relative quietness, too, and its 600ml bin is roomy enough to go through several cleanings before it needs to be dumped.