Shark robot vacuums are on sale for Prime Day and there are some good deals to be had. For instance, the AI Ultra is on sale for just $280. This is 50 percent off, as the regular price is $550. This model topped our list of the best robot vacuums,

As of July 3, the iRobot Roomba Plus 405 is on sale for $399.99. This deal saves you $400 on list price, and is the lowest-ever price according to camelcamelcamel. Our robot vacuum expert has hand-picked this deal as one of the best ahead of Prime Day.

Voted the best overall robot vacuum in our guide, the Shark PowerDetect 2-in-1 offers the best of everything. It intelligently mops and vacuums your floors for up to 30 days. Just set a schedule and the robot returns to its base to empty the dustbin, wash the mop, and refill the tank automatically.