iRobot Roomba 871 Vacuum Cleaning Robot

We've upgraded our Roombas, so selling the old ones. This unit works fine, is grubby and needs a clean though.

Battery has been switched out, I tested and it runs for 17 mins. Charger makes a weird click when charging, but has done that for years, the click is the charger and not unit as I've got another one I tested with.

Any questions, just ask!