To estimate the price of the 2019 Kia Rio I4 1.4L LX (Base) with 100000 km mileage in average condition, I considered the following data points: 1. The 2018 Kia Rio I4 1.4L LX (Base) with 70000 km sold for 35000 SAR on 2023-10-15. Adjusting for the additional year and higher mileage, the price would be slightly lower. 2. The 2017 Kia Rio I4 1.4L LX (Base) with 114733 km sold for 17000 SAR and 26000 SAR in November 2023. The wide range suggests variability based on condition and market demand. 3. The 2017 Kia Rio I4 1.4L LX (Base) with 172000 km sold for 26000 SAR on 2024-03-06, and another with 163000 km sold for 28224 SAR on 2024-05-24. These prices are higher due to the recent sale dates and possibly better market conditions. 4. The listed prices for 2019 models are 37500 SAR and 36000 SAR, which are higher than actual selling prices, indicating a negotiation margin. Considering the depreciation and the average condition of the car, I adjusted the price accordingly.