TechRabbit offers the used Ecovacs Deebot N78 Robotic Vacuum Cleaner in Black for $99.99 with free shipping. That's $35 under our July mention of a new one and $40 less than you'd pay for a new unit today. It's designed to clean hard surface floors and features multiple cleaning modes, a high-efficiency filtration system, two side brushes, smart infrared sensors, automatic charging, daily scheduling, remote control, and rechargeable battery with up to 110 minutes of cleaning time per charge. Deal ends December 12.

Note: A 1-year TechRabbit warranty applies.