iRobot is pretty popular for their robot vacuums in their Roomba lineup, and the Roomba 650 is one of their more inexpensive models. This robot vacuum means that you won't need to clean your home ever again, which is a good reason to grab one. The Roomba 650 isn't the most thorough, but it does mean that you won't need to vacuum as often - unless you have pets and might be allergic to them.
Over on eBay, there is a refurbished iRobot Roomba 650 available for just $249. Which is a great price for this robot vacuum. Typically, these go for around $400 brand new, so that is a pretty incredible price, all things considered. Now this is a refurbished model, but you still do get a warranty, and returns are accepted. So if there is something wrong with the Roomba 650, you can return it and get your money back, which is definitely good for some peace of mind. You can pick up the iRobot Roomba 650 from the link below.