Prime Day deal: Pick up this Roomba robot vacuum while it's down to $150

Robot vacuums are great items to look for during events like October Prime Day. They're usually hundreds of dollars off, so you can save a ton if you're buying one as a gift or you want to upgrade an aging robovac you have at home already. One of the best deals this time around is on the iRobot Roomba 104, which is 40 percent off and on sale for only $150.

This is a newer version of the unit that topped our list of the best budget robot vacuums. It's an entry-level robovac that gets the job done. The cleaning motor is fairly powerful and it ships with a multi-surface brush and an edge-sweeping brush. The vacuum uses LiDAR to map a home and to help it avoid obstacles when cleaning.

It's also been equipped with specialized sensors to prevent falling down stairs. Steps ...