Woot is currently discounting the iRobot Roomba 860, dropping it down to just $274.99. That is good for about $125 off of the regular price. This is also for a refurbished model, so keep that in mind. But it does still come with a warranty, so you're still going to be perfectly fine, even if something does happen to this robot vacuum.
The iRobot Roomba 860 does include the company's patented three-stage cleaning system. This allows the Roomba to pick up all of the dirt and dust that might be in your home, without worrying about needing to break out the old-school vacuum to clean your home. It won't leave anything behind, and it will also do a great job of cleaning up behind your pets.
iRobot also maps out your home so that it knows where it needs to go. iRobot does not sell this information to other companies. It is solely collected so that the Roomba can clean your entire home, and not miss any spots. Unlike cheaper robot vacuums that just roam around in random directions, the Roomba 860 sticks to a pattern.
You can pick up the iRobot Roomba 860 from Woot using the link below. Remember that it won't be this price for long, so you're going to want to grab one before it's gone.