Fair price offered on line at 10:00 am, booked same day appointment at Köln Longerich buying station at 16:00. Met by very friendly and helpful staff. 30 minutes thorough check of the car and all documents. 10 minutes later they confirmed the online offer. 10 minutes later the car was purchased and immediately deregistered. Money transferred to my bank account the next day. What more could you ask for? Great service would definitely use this service again and would recommend anyone to use the buying station in Köln Longerich if this is in your area.