iRobot Roomba Plus 405 Combo Vacuum & Mop w/ AutoWash Dock $300 at Amazon $300 $800 2K+ bought in past month. Amazon has the iRobot Roomba Plus 405 Combo Vacuum & Mop w/ AutoWash Dock (G181) on sale for $300 with free shipping. Dual spinning mop pads, self-empties for 75 days. $300 retail: $800 Posted by DrBatman04/21/2026 at 06:20 PM PT