Decided to sell my Polaris 280 since I bought Dr. Leo Marvin (the robot) about a month ago. Had my wife post it on one of those porch selling sites and sold it the first day for $175. It was 4 years old. The guy had a 280 as well and I think was going to use mine for replacement parts. Just a PSA that if you buy a robot you can easily make up some of the cost!