To estimate the price of the 2019 Nissan Sentra I4 1.8L S (Mid), 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. The 2018 Sentra with 154000 km sold for 26000 SAR. These prices suggest a depreciation trend based on mileage and year. The 2019 Sentra 1.6L S (Base) with 87500 km was listed for 40000 SAR, and a 2020 Sentra 1.8L S (Mid) with 65000 km was listed for 48000 SAR. The 2019 Sentra 1.8L S (Mid) with 127500 km was listed for 39000 SAR. Considering the 2019 model year, 72500 km mileage, and the mid-trim level, I estimate the price to be slightly lower than the 2020 1.8L S (Mid) listing but higher than the 2019 1.6L S (Base) listing, around 42000 SAR.