IRobot Roomba j9+ Self-Emptying Robot Vacuum - FOR PARTS/REPAIR (PLEASE READ)
As-isWhat the seller says
Robot is stuck in a boot loop and will not successfully factory reset. Unable to fully test due to startup issue. Sold AS-IS with NO RETURNS due to its defective condition. Heavy signs of previous use. Scratches, scuffs, and cosmetic wear on the robot. Scratches and wear on the self-emptying dock. Overall cosmetic condition is consistent with a heavily used item
Likely faults & repair cost
The stated fault does not map to a single common repair part, so treat this as a parts or board-level unit and confirm the real cost before buying. The common failure points for this kind of item are below for reference. Subtract the relevant one from the $157 margin to gauge the real spread.
Common faults for this model
Repair costs are rough parts estimates, not a diagnosis of this exact unit. Confirm the fault and your repair path before you buy.