Servo drive has been refurbished and tested. The unit is in working condition with a 30 day WARRANTY. Buyer will be responsible for shipping cost in case there is an issue with the unit and if warranty label is tampered with, warranty will be voided. This is an exchange, will need to receive the core unit or make a refundable deposit while we send the unit and wait for your core exchange unit which must be in repairable condition. Email us for a core deposit estimate. Next day shipping available upon request.