To estimate the price of the 2023 GAC GS4 I4 1.5L Turbo Charged GL (Top) with 17000 km mileage, I considered the listed prices of similar cars. The 2022 GAC GS4 GL (Top) with 14000 km is listed for SAR 46500. The 2023 GAC GS4 GE (Mid+) with 7500 km is listed for SAR 73000, and another 2023 GE (Mid+) with 1800 km is listed for SAR 50000. The 2021 GAC GS4 GS (Base) with 32000 km is listed for SAR 40500. Given that the car in question is a 2023 model with slightly higher mileage than the 2022 GL (Top) and considering the higher trim level compared to the GE (Mid+), I adjusted the price slightly higher than the 2022 GL (Top) but lower than the 2023 GE (Mid+).