Reconditioned models of the iRobot Roomba 415 vacuum cleaning robot are on sale for just $99.99 at Buy.com. New Buy.com customers can spend $0.01 more and use this $5 off coupon. The Roomba vacuums your house on command (including carpeting, hardwood, tile, linoleum, and concrete), and without guidance. This model also allows for two virtual walls, letting you block areas you don't want it cleaning. Shipping is free and there's no sales tax (except CA, MA, MD, NY, TN). Be aware that color choice is not an option.