To estimate the price of the 2021 BMW 730 Li I4 2.0L Twin Power Turbo (M Kit) Li (Top) with 15100 km mileage, I analyzed the listed prices of similar cars. The listed prices range from SAR 195500 to SAR 277000. The closest matches in terms of mileage and condition are: 1) A car with 16000 km listed for SAR 277000, 2) A car with 12000 km listed for SAR 240500, and 3) A car with 21000 km listed for SAR 215000. Considering the average of these prices and the fact that listed prices are generally higher than selling prices, I adjusted the estimate slightly lower to reflect a more realistic market value.