Thumb Score: +17 Costco Wholesale has for their Members: Roborock QX Revo Vacuum & Mop Robot w/ Multifunctional Dock on sale for $670. Shipping is free. Comes with 2 year warranty when purchased from Costco vs 1 year standard warranty. About this Item:[list][*]PreciSense LiDAR Navigation Optimizes the Cleaning Route within Your Home[*]5500Pa Extreme Suction Captures Even the Smallest Debris and Dirt[*]Dual Spinning Mops Clean with 200 RPM Rotating Speed and Consistent Pressure[*]Self-Washing & Self-Drying Dock Cleans and Dries the Mop Pads After Every Use