Get yourself a Roomba 670 while it's over $150 off
www.mashable.com Save $153: The iRobot Roomba 670 is on sale for $177 at Walmart — that’s $153 off its usual price. If you’re looking for a robot vacuum, this one’s a solid mid-range model with many of the same features as the more expensive models, minus the price tag. Not all Roombas are created equal. There…