Best Buy via eBay offers the Ecovacs Robotics WinBot Window-Cleaning Robot
in Champagne, model no. W710-R, for $161.99
with free shipping
. That's $18 under our mention from a month ago and the lowest total price we've seen. (It's also a current best by $18.) It utilizes an on-board computer and multiple sensors to calculate the size of your window and program a custom cleaning path. It features an approximate cleaning path of 9", 1-button operation, two cleaning pads and squeegee, and remote.