iRobot Roomba 960 for $400, E5 for $280, and 675 for $200 $399.99

Three Roombas on sale currently. 3C has shown significant price differences even within past week. Prices are relatively similar to pre-Christmas 2019 prices but went up after Xmas. 960 series for $400. https://www.amazon.com/iRobot-Roo...101&sr=8-3 E5 (5150) series for $280. https://www.amazon.com/iRobot-Roo...488&sr=8-3 675 series for $200. https://www.amazon.com/iRobot-Roo...543&sr=8-3