I started by examining the selling prices of similar cars. The most relevant data point is the 2014 BMW X5 xDrive 35i with a similar engine and condition, sold for 81500 SAR on 2023-11-12. This car is one year newer and has lower mileage than the target car. The 2011 model with the same variant sold for 25000 SAR, but it is much older. The 2012 model sold for 34500 SAR, but it has much higher mileage. The 2015 models with a different variant sold for 70000 SAR, but they are newer and have a different trim. The listed prices for 2013 models are 45500 SAR and 50000 SAR, but these are not actual selling prices. Considering the 2014 model's selling price and adjusting for the older year and higher mileage of the target car, I estimate the market price to be slightly lower than 81500 SAR.