To estimate the price of the 2021 BMW 730 I4 2.0L Twin Power Turbo Li (Top) with 4000 km mileage, I analyzed the listed prices of similar cars. The closest match is a car with the same specifications and mileage listed for SAR 275500. Other similar cars with higher mileage (12000 km to 40000 km) are listed between SAR 195500 and SAR 277000. Considering the low mileage of the target car and the listed prices, I estimate the market price to be slightly lower than the highest listed price but higher than the average of the lower mileage cars.