Dyson, Shark and Bissell are all offering steep savings on robot and handheld vacuums, and even combination mop/vacuum devices. These deals end tonight, when Amazon Prime Day does, so don't linger too long. Bissell CleanView Swivel Full-Size Vacuum Cleaner $89.99 at Amazon

SAVE $400: As of July 11, the Shark Matrix Plus Robot Vacuum is on sale for $299.99 at Amazon. That's a 57% savings on the list price.

Some of the best robot vacuums we've tested are on sale for Prime Day, including savings of up to 50% on top-rated models from iRobot, Shark and Eufy.