To estimate the price of the 2016 BMW 640 V6 3.0L Twin Power Turbo Standard, I first looked at the selling price of a similar car: a 2015 BMW 640 I6 3.0L Twin Power Turbo (M Kit) with 185000 km mileage, which sold for SAR 66000 in April 2024. Given that the target car is a year newer and has lower mileage (114000 km), it should be valued higher. Next, I considered the listed prices of similar cars. The closest match is a 2016 BMW 640 V6 3.0L Twin Power Turbo with the same mileage listed for SAR 85000. Other listings include a 2014 model with 106000 km listed for SAR 75000 and a 2015 model with 33300 km listed for SAR 83000. Considering the average condition of the target car and the fact that listed prices are generally higher than selling prices, I adjusted the estimate downwards from the highest listed price. Factoring in the depreciation and the market trends, I arrived at a reasonable estimate.