Amazon has the iRobot Roomba 850 Robotic Vacuum on sale today for $399. That is good for $100 off of its regular price, and makes it a great robot vacuum to pick up right now. This is one of the first times that this particular model has been discounted.
The Roomba 850 is slightly different from some of the other robot vacuums, from iRobot. For instance, this model does not work with WiFi, which means no Alexa or Google Assistant support here, unfortunately. But this still has all of the usual features you'd find in a robot vacuum. That includes the ability to schedule cleanings with the Roomba app - available on Android and iOS - as well as controlling the vacuum, and telling it where to go. This model actually comes with a remote, so you don't need to use the smartphone app to control it, which is also a pretty nice feature to have here. There is also the Aero Force 3-Stage Cleaning System here, which is going to do a pretty good job at getting your home nice and clean. It will also do a good job with getting pet hair up and out of the carpet in your home. Which is going to be a good thing for those that might be allergic to pets, but love their pets.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap (usually $3.99) next-day shipping if you need it extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime. You'll get 30 days free (if you're a student, you get 6 months), and then it's $119/year (or $59/year for students). Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.