GearBest offers the Roborock S50 Smart Robot Vacuum Cleaner for $399.99 $396.99 with free shipping. That's $28 under our June mention and the lowest price we could find by $69. It features sweep and mop modes, intelligent route planning, and a 2.5-hour run time. Deal ends August 31.

Note: This item ships from Hong Kong and may take up to three weeks to arrive.