iRobot Roomba 690 Wi-Fi Connected Robotic Vacuum With charger

The seller did not pin down a precise fault. These are the common failures for this kind of item, with rough parts costs. Subtract the relevant one from the $60 margin to gauge the real spread.

Common faults for this model

• Battery$20 to $40eBayAmazon
• Wheel module$15 to $35eBayAmazon
• Brush motor$20 to $40eBayAmazon

Repair costs are rough parts estimates, not a diagnosis of this exact unit. Confirm the fault and your repair path before you buy.