To estimate the price of the 2015 Lexus LX570 V8 5.7L Signature Black Edition (Top) with 67928 km mileage, I analyzed the listed prices of similar cars. The closest match is a 2015 Lexus LX570 V8 5.7L Signature Black Edition (Top) with 92000 km listed for SAR 220000. Considering the lower mileage of the target car, it should be valued higher. Other 2016 models with higher mileage (115000 km to 336000 km) are listed between SAR 212000 and SAR 265500. Given the target car's lower mileage and good condition, I adjusted the price upwards from the 2015 model with 92000 km. The 2016 models with similar mileage (around 100000 km) are listed around SAR 235000 to SAR 255500, suggesting a higher value for the target car. Factoring in the lower mileage and good condition, I estimate the market price accordingly.