To estimate the price of the 2018 Peugeot 3008 GT Line I4 1.6L Turbocharged with 80000 km mileage, I first considered the selling price of a similar 2019 model with 61000 km sold for SAR 72000 in November 2023. Given the 2018 model is a year older and has higher mileage, I adjusted the price downwards. Next, I looked at listed prices of similar 2018 models: SAR 67500 (80000 km), SAR 49500 (115972 km), SAR 70000 (124000 km), and SAR 65000 (124964 km). The closest match in terms of mileage and year is the SAR 67500 listing. Considering the car's average condition, I adjusted the price slightly lower than the SAR 67500 listing to account for potential negotiation and condition differences.