Today only, Amazon offers the Evolution Robotics Mint Automatic Hard Floor Cleaner
, model no. 4200, for $156.95
. With free shipping
, that's the lowest total price we could find by $17, although we saw it for $7 less on Black Friday. This compact robot floor cleaner runs on two C batteries (included) for up to three hours on a single charge. It includes two dry sweeping microfiber cloths and one wet mopping microfiber cloth.