The car in question is a 2021 Ford Focus Standard Sedan with 100,000 km mileage. We have the new car price for the 2025 Ford Focus Standard Sedan at SAR 80,000. Assuming a 15% annual depreciation, the 2021 model would have depreciated for 4 years. Calculating the depreciation: 1st year: 80,000 * 0.85 = 68,000; 2nd year: 68,000 * 0.85 = 57,800; 3rd year: 57,800 * 0.85 = 49,130; 4th year: 49,130 * 0.85 = 41,760.5. Therefore, the estimated market price for the 2021 model is approximately SAR 41,761.