Buy.com has the iRobot 4150 Roomba Vacuuming Robot for $129.99 with Free SHipping for a limited time.

The Roomba 4150 features automatic randomly directed complete room coverage, optimized dirt detect mode that leads to more time vacuuming dirtier areas, and bagless bin for lower cost of operation. This Roomba model ships with two virtual wall markers for controlling the vacuum’s operating area, rechargeable battery, fast charging station, filter, and a spare replacement brush kit.