To estimate the price of the 2020 Nissan Sunny I4 1.5L S A/T (Base) with 157000 km mileage, I first looked at the selling prices of similar cars. The closest match is a 2020 Nissan Sunny I4 1.5L S A/T (Base) with 72000 km sold for 36500 SAR on 2023-12-27. Given the higher mileage of the target car, I adjusted the price downwards. Another relevant data point is a 2019 Nissan Sunny I4 1.5L S A/T (Base) with 130000 km sold for 25000 SAR on 2024-05-08. Considering the target car is a year newer but has higher mileage, I adjusted the price slightly upwards from this point. The listed prices of similar cars with 157000 km and 131000 km are 30500 SAR and 33000 SAR respectively, but these are higher than actual selling prices. Taking all these factors into account, I estimated the market price accordingly.