To estimate the price of the 2021 Toyota Corolla I3 1.5L XLI (Base) with 54000 km mileage and average condition, I considered the following data points: 1. Selling prices of similar cars: - A 2021 Corolla XLI (Base) with 71000 km and average condition sold for 53000 SAR on 2024-06-22. - A 2021 Corolla XLI Executive (Base+++) with 91000 km and average condition sold for 50000 SAR on 2024-08-20. 2. Listed prices of similar cars: - A 2021 Corolla XLI (Base) with 71000 km listed for 53500 SAR, delisted on 2024-06-23. - A 2021 Corolla XLI (Base) with 72000 km listed for 56000 SAR, delisted on 2024-04-25. Considering the car's mileage of 54000 km, which is lower than the average of the listed and sold cars, and its average condition, I estimated the market price to be slightly higher than the lowest selling price but lower than the highest listed price.