The car to be estimated is a 2018 Hyundai Elantra I4 2.0L Smart (Base) with 143500 km mileage. The most relevant data point is a 2018 Elantra I4 2.0L Smart (Base) listed for SAR 45500 with 126000 km, delisted in September 2024. Considering the higher mileage of the target car, a reduction is necessary. A 2017 Elantra I4 2.0L Smart (Base) with 114000 km sold for SAR 44000 in June 2023, indicating a depreciation trend. A 2019 Elantra I4 2.0L Smart (Base) with 200000 km sold for SAR 39000 in July 2023, suggesting a lower price for higher mileage. Given these data points, the estimated price for the 2018 model with 143500 km is adjusted to reflect its condition and market trends.