To estimate the price of the 2016 Nissan Sentra I4 1.8L S (Mid) with 157000 km mileage, I first looked at the selling prices of similar cars. The 2015 Sentra I4 1.8L S (Base) with 166000 km sold for 25000 SAR on 2024-08-07, which is a close match in terms of engine size and condition. The 2016 Sentra I4 1.6L SL with 211000 km sold for 25000 SAR on 2024-07-18, but it has a higher mileage and is a different variant. The 2015 Sentra I4 1.6L with 114000 km sold for 26000 SAR on 2023-10-22, but it has a smaller engine. The 2014 Sentra I4 1.8L SV with 325000 km sold for 14000 SAR on 2024-09-09, but it has much higher mileage and is an older model. For listed prices, the 2015 Sentra I4 1.8L S (Base) with 166000 km was listed for 29000 SAR but delisted on 2024-08-08, and the 2016 Sentra I4 1.6L S (Base) with 171000 km was listed for 26500 SAR but delisted on 2024-06-10. Considering these data points, the selling prices of similar cars, and the listed prices, I estimate the market price of the 2016 Nissan Sentra I4 1.8L S (Mid) to be around 26000 SAR.