To estimate the price of the 2015 Kia Optima I4 2.4L LX (Mid) with 299,000 km mileage, I focused on the selling prices of similar cars. The most relevant data points are: a 2015 Kia Optima I4 2.4L LX (Mid) with 165,000 km sold for 29,000 SAR on 2024-06-24, and another with 248,000 km sold for 26,000 SAR on 2024-08-07. Given the higher mileage of the target car, its value should be lower. The 2015 Kia Optima I4 2.4L GDI (Base) with 256,500 km sold for 34,000 SAR on 2023-04-28, but this is a different variant. Considering the mileage and variant differences, I estimate the price to be slightly lower than the 26,000 SAR sale, accounting for the additional mileage and average condition.