To estimate the price of the 2019 Chevrolet Impala V6 3.6L LT (Mid) with 198000 km mileage, I considered several data points. First, I looked at the selling prices of similar cars. A 2018 Impala LT (Base) with 360000 km sold for 36500 SAR on 2023-10-23, a 2019 Impala LTZ (Top) with 22000 km sold for 90000 SAR on 2024-03-13, and a 2018 Impala LS (Base) with 166000 km sold for 30000 SAR on 2024-07-23. Given the higher mileage of the target car, its price should be lower than the 2019 LTZ but higher than the 2018 LS. Next, I reviewed listed prices: a 2019 Impala LT (Base) with 201600 km was listed for 45000 SAR, and a 2018 Impala LT (Mid) with 195000 km was listed for 53000 SAR. Considering the target car's mid-trim and good condition, I adjusted the price slightly lower than the listed 2018 LT (Mid) but higher than the 2019 LT (Base).