LightInTheBox offers the 2nd-generation Xiaomi Roborock Mi 2-in-1 Smart Robot Vacuum Cleaner in White for $459.99 with free shipping. (Choose "Economy Express" during checkout.) That's the lowest price we could find by $46. This 2-in-1 vacuum sweeps and mops and features a 360° laser distance sensor, SLAM algorithm route planning, four anti-drop sensors, washable filter, adjustable-height brush, remote control via the Mi Home mobile app, self-charging, and up to 2.5 hours of cleaning per charge.

Note: This item ships from China and may take two to three weeks to arrive. If you wish to receive it sooner, opt for expedited shipping for just a penny more. Uncheck "Add shipping insurance to your order" during checkout to remove the $9.99 fee. The countdown timer on the product page does not reflect an actual expiration time and resets daily.