To estimate the price of the 2016 Kia Optima I4 2.4L LX (Mid) with 288956 km mileage, I focused on the selling prices of similar cars. The closest match is a 2015 Kia Optima I4 2.4L LX (Mid) with 248000 km sold for 26000 SAR on 2024-08-07. Considering the higher mileage of the target car, a slight reduction in price is reasonable. Another relevant data point is a 2015 Kia Optima I4 2.4L LX (Mid) with 165000 km sold for 29000 SAR on 2024-06-24, but the mileage difference is significant. The 2016 Kia Optima I4 2.0L GDI (Base) with similar mileage sold for 26500 SAR on 2024-02-23, which supports a price around this range. Given these data points, I estimate the market price considering the higher mileage and average condition of the target car.