This may be your last, best chance to score a robot vacuum deal

Robot vacuums were some of the hottest products this past Black Friday and Cyber Monday, with nearly every model selling out within a matter of hours at all-time low prices. Luckily, it seems like several manufacturers of the most popular models have been able to secure some more inventory, and Amazon is slashing prices across the board. That doesn't mean every one is a great deal. We test robot vacuums in our lab in Cambridge, MA to find out how well each model picks up dirt as well as how well it can navigate a slew of obstacles--just like the ones it'll confront in your home. Based on current sales, our favorite in-stock pick is definitely the iRobot Roomba 770 ($339.99 at Amazon, SAVE $159.01) which is at a record low price of just $339.99,