To estimate the price of the 2015 Chevrolet Impala V6 3.6L LTZ (Top) with 230000 km mileage, I considered several data points. First, I looked at the selling prices of similar cars. A 2016 Impala LTZ (Top) with 180000 km sold for 57500 SAR on 2024-06-01. Given the higher mileage of the target car, I adjusted the price downwards. A 2014 Impala LT (Base) with 232000 km sold for 23500 SAR on 2024-01-28, but this is a base variant and older model. A 2016 Impala LT (Base) with 214000 km sold for 42000 SAR on 2023-10-13. Considering the LTZ trim is higher than LT, I adjusted the price upwards. Next, I reviewed listed prices: a 2015 Impala LTZ with 230000 km is listed for 49500 SAR, and another with 252000 km is listed for 40500 SAR. These listings are higher than actual selling prices, so I adjusted downwards. Combining these data points, I estimated the market price.