Newegg has the Xiaomi Roborock S50 Smart Robot Vacuum Cleaner for only $364 after a price drop from $500. You save 27% off the retail price for this robotic vacuum cleaner. Plus, this item ships free. This is the lowest price we could find online by about $10. The Xiaomi Roborock S50 Smart Robot Vacuum Cleaner features double cleaning (sweep first then mop), LDS intelligent route planning, APP remote control, super suction, and large capacity battery. Sales tax is charged in some states. Deal expires October 14, 2018.