Buy.com has an iRobot Roomba Discovery 4130 Vacuum 2-Pack for only $239.99 plus free shipping. Plus, new customers can use this $15 off coupon or new Google Checkout can get a $10 off discount (you can't get both). There is no sales tax as well (except CA, MA, MD, TN). The effective $120 each for a Roomba is one of the best deals I've ever seen. The iRobot Roomba is basically a little robotic maid that cleans multiple rooms at the touch of a button.