To estimate the price of the 2023 BMW 420 I4 2.0L Twin Power Turbo Standard coupe with 19000 km mileage, I considered the listed price of a similar 2021 model with 73000 km mileage, which is SAR 192500. Given that the 2023 model is newer and has significantly lower mileage, it would be valued higher. Typically, cars depreciate by about 10% per year. The 2021 model is two years older, so we can estimate a 20% depreciation from the 2023 model's price. Adjusting for the lower mileage and newer model year, I estimate the 2023 model to be approximately 25% higher in value than the 2021 model. Therefore, the estimated price is calculated as 192500 * 1.25.