To estimate the price of the 2019 Mazda CX-5 I4 2.5L Signature (Top) with 100,000 km mileage, I first considered the selling prices of similar cars. A 2019 model with 40,000 km sold for 88,000 SAR in March 2024. Given the higher mileage of the target car, its value would be lower. A 2021 model with 74,000 km sold for 97,000 SAR in February 2024, but it is newer. The 2018 model with 149,650 km sold for 58,000 SAR in October 2023, which is older and has more mileage. The listed price for a similar 2019 model with 83,367 km was 80,000 SAR, but it was delisted, indicating it might not have sold at that price. Considering these data points, the target car's price should be lower than 88,000 SAR due to higher mileage and average condition, but higher than 58,000 SAR due to being newer and a top variant. I estimate the market price to be around 75,000 SAR.