To estimate the price of the 2021 MINI Cooper Twin Power Turbo I4 1.5L S 5-Door, I first considered the selling prices of similar cars. The 2022 MINI Cooper I4 2.0L S 3-Door sold for 151500 SAR, and the 2019 MINI Cooper I4 1.5L S 3-Door sold for 76000 SAR. The 2021 model is between these years, and the 1.5L engine is less powerful than the 2.0L, suggesting a lower price than the 2022 model. Next, I looked at listed prices. A 2021 MINI Cooper Turbocharged I4 1.5L S 5-Door is listed for 100000 SAR, which is a close match in terms of year, engine, and variant. Considering the mileage of 58000 km, which is higher than the listed car's 44300 km, a slight reduction from the listed price is reasonable. The 2020 MINI Cooper I4 2.0L S 5-Door listed for 95000 SAR also supports a price around this range. Therefore, I estimate the market price to be slightly below the listed price of 100000 SAR, considering the higher mileage and market trends.