To estimate the price of the 2017 Chevrolet Spark I4 1.4L LT (Base) with 149000 km mileage, I first looked at the selling price of a similar car: a 2019 Chevrolet Spark I4 1.4L LT (Base) with 120500 km sold for SAR 26000 in November 2023. Considering the 2-year difference and additional mileage, I adjusted the price downwards. Next, I reviewed listed prices of similar cars. A 2017 model with the same mileage is listed for SAR 20000, and another 2017 model with higher mileage (197500 km) is listed for SAR 22000. Additionally, a 2018 model with similar mileage (145000 km) was listed for SAR 20000. These listings suggest a market range between SAR 20000 and SAR 22000. Given the average condition and the fact that listed prices are often higher than selling prices, I estimated the market price slightly below the lower end of the listed range.