To estimate the price of the 2020 Volkswagen Passat I5 2.5L Trendline (Base) with 121,000 km mileage, I first considered the selling price of a similar 2018 Passat with the same variant and average condition, which sold for SAR 41,000 on 1 May 2024. This car had higher mileage (156,000 km) and was two years older. Next, I looked at a 2020 Passat Trendline listed for SAR 63,000 with lower mileage (77,500 km), delisted in February 2024. Given the higher mileage of the target car, its value would be lower. The 2020 Highline variant with similar mileage was listed for SAR 77,000, indicating a higher trim value. Considering these factors, the estimated price for the target car is adjusted downwards from the SAR 63,000 listing due to higher mileage and average condition.