Update: Deal over.
Today only, Amazon has Cordey robotic vacuums on sale at up to 50% off!
As a sample deal, you can pick up the Coredy Robot Vacuum Cleaner, Fully Upgraded, Boundary Strip Supported, 360° Smart Sensor Protection, 1400pa Max Suction, Super Quiet, Self-Charge Robotic Vacuum for only $99.53 w/ free shipping!