To estimate the price of the 2018 Cadillac CT6 Turbo Charged V6 3.6L Sport (Mid), I focused on the listed prices of similar cars since no selling prices or offers were available. The closest match is a 2018 Cadillac CT6 V6 3.6L Sport (Mid) with 59000 km listed for SAR 99500. Considering the target car has higher mileage (81000 km), I expect a lower price. A 2017 model with the same variant and higher mileage (186000 km) is listed for SAR 66500, indicating a significant depreciation with mileage. The 2018 Premium Luxury variant with 180000 km is listed for SAR 122500, showing higher prices for higher trims. Balancing these factors, I estimate the target car's price slightly below the 2018 Sport (Mid) listing due to higher mileage.