The car to be estimated is a 2021 GAC GS3 I4 1.5L GS (Mid) with average condition and 73974 km mileage. The most relevant data point is the 2022 GAC GS3 I4 1.5L GS (Mid) with 79500 km sold for 38000 SAR on 2024-09-30. This car is one year newer but has slightly higher mileage and is in good condition, suggesting a slightly lower price for the 2021 model. The 2021 GAC GS3 I4 1.5L Standard with 35000 km sold for 38500 SAR on 2023-06-26, but it is in better condition and has much lower mileage. Considering the average condition and higher mileage of the target car, a reasonable estimate would be slightly lower than 38000 SAR.