To estimate the price of the 2015 BMW 520 I4 2.0L Twin Power Turbo with 281000 km mileage, I first looked at the selling prices of similar cars. The 2016 model with 167000 km sold for 55500 SAR, and another 2016 model with 251000 km sold for 54500 SAR. The 2013 models with higher mileage (234000 km and 271000 km) sold for 31500 SAR and 32000 SAR respectively. The 2014 model with 147000 km sold for 55000 SAR. Given the higher mileage of the target car, I adjusted the price downwards. I also considered the listed prices of similar 2015 models: 49000 SAR (281000 km), 62000 SAR (263000 km), and 55000 SAR (232000 km). The listed prices are generally higher than selling prices, so I adjusted accordingly. Based on these data points, I estimated the market price considering the higher mileage and average condition.