Roomba robot vacuums made by iRobot are displayed on a shelf at a Bed Bath and Beyond store in Larkspur, California, on Aug. 5, 2022.Justin Sullivan | Getty ImagesShares of iRobot plunged more than 30% on Monday after the company warned its search for a buyer has hit a substantial roadblock and its financial condition remains dire.The Roomba maker has been vying to sell itself since March, but last week, the only remaining potential buyer withdrew from the process following a "lengthy period of ...