Linens n' Things now has the iRobot Roomba 4210 Discovery Robotic Vacuum for $279.99 but it is only $223.99 after 20% off one item coupon code MAY0407 (valid through 5/13). Plus, this rebate is good for a free $130 iRobot Dirt Dog by mail. Shipping adds $24.99 so consider free in-store pickup. Simply press "clean" and the Roomba cruises around your home and vacuums for you. Rebate aside, this is the best price on the 4210 I've seen this year. Amazon, which is the next best option, is currently $242 and has never been lower than $239.