This deal has ended.
Amazon has a refurbished model of the iRobot Roomba vacuum, which retails for close to $300 when new, for $169.99. If you use the $25 off coupon code the price gets cut to $144.99. Shipping is free and there is no sales tax. The Roomba is an artificially intelligent vacuum that moves from room-to-room cleaning any floor surface in your home.