To estimate the price of the 2019 Nissan Sentra I4 1.6L 1.8L S (Mid) with 127500 km mileage, I first considered the selling prices of similar cars. A 2020 Sentra 1.6L S (Base) with 49000 km sold for 40000 SAR, and a 2018 Sentra 1.6L S (Base) with 182000 km sold for 31500 SAR. Another 2018 Sentra with 154000 km sold for 26000 SAR. The 2019 model is between these years, and its mileage is lower than the 2018 models but higher than the 2020 model. The 2019 Sentra is a mid-trim, which typically commands a higher price than the base trim. Considering the listed prices, a 2019 Sentra 1.6L S (Base) with 87500 km is listed for 40000 SAR, and a 2020 Sentra 1.8L S (Mid) with 65000 km is listed for 48000 SAR. Given the 2019 model's mid-trim and mileage, I estimate its market price to be slightly lower than the 2020 mid-trim but higher than the 2018 base trims, around 37000 SAR.