Cafago offers the Cop Rose Household Cleaning Robot for $237.83. Coupon code "ZH18246MG" cuts that to $163.91. With free shipping, that's $156 off and the best price we could find. It's suitable for many surfaces with three types of operation modes.
Note: This item ships from mainland China and may take two to six weeks to arrive. Also, the countdown timer on the product page does not reflect an actual expiration time and resets daily.