Roombas, if you somehow missed one of the defining inventions of the 2000s, are puck-shaped vacuum cleaners that automatically wander around your house or apartment on a schedule, sucking up dust and pet hair for you. It’s quite satisfying to watch them work, and iRobot has some good Cyber Monday deals on all of its Roomba vacuum models. For a mid-range robo-vac, the Roomba i3 is down to $299, a discount of $100.Cyber Monday dealsCyber Monday 2020 deals: the place to go for the all the best Cyber Monday bargains.Amazon Cyber Monday deals 2020The Roomba i3 also listed on Amazon for the same price (actually $0.99 cheaper), and the price history there reveals that this is a true deal—the Roomba i3 normally goes for $350 to $400. This is the cheapest the model has ever been on Amazon.The i3 isn’t the only Roomba on sale. You can instead go with a more powerful i7 Roomba for $399 on Amazon or iRobot, which usually goes for $500 to $600 (thanks, Wayback Machine). It’s an expensive vacuum cleaner, but $200 off feels good.Alternatively, you could go for the cheaper Roomba 614 for $224, although it’s only $25 off, making the mid-range i3…