To estimate the price of the 2023 Hyundai Elantra I4 2.0L Smart (Base) with 4000 km mileage, I first looked at the selling prices of similar cars. The closest match is a 2024 Hyundai Elantra I4 2.0L Smart (Base) with 38600 km sold for 65000 SAR on 2024-07-17. Given the lower mileage of the target car, it should be valued higher. Another relevant data point is a 2023 Hyundai Elantra I4 1.6L Smart (Base) with 38000 km sold for 62000 SAR on 2024-02-01. Considering the engine size difference, the 2.0L variant should be priced higher. The listed price of a similar 2023 Hyundai Elantra I4 2.0L Smart (Base) with 4000 km is 79500 SAR, but listed prices are generally higher than selling prices. Factoring in these points, I estimate the market price to be slightly lower than the listed price but higher than the selling prices of higher mileage cars.