To estimate the price of the 2018 Peugeot 3008 GT Line, I first considered the selling price of a similar 2019 model with lower mileage (61000 km) sold for SAR 72000 in November 2023. Given the one-year difference and higher mileage of the target car, a depreciation adjustment is necessary. Next, I looked at an offer accepted for a 2018 model with similar mileage (124964 km) at SAR 63000 in August 2024, which is a strong indicator of market value. Additionally, a similar 2018 model with 124000 km was listed for SAR 70000 but was delisted, suggesting it might have been overpriced. Another listing for a 2018 model with 80000 km was at SAR 53000, indicating a lower bound. Considering these data points, the accepted offer of SAR 63000 is a reliable estimate, adjusted slightly for the target car's mileage and condition.