To estimate the price of the 2014 Renault Duster I4 2.0L PE (Base) with 166,000 km mileage, I focused on the selling prices of similar cars. The most relevant data point is a 2014 Duster I4 2.0L PE (Base) with 295,000 km sold for 15,000 SAR on 2024-08-17. This car has higher mileage, suggesting a slightly higher value for the target car. Another 2014 Duster I4 2.0L PE (Base) with 125,000 km sold for 15,000 SAR on 2023-08-08, indicating a similar price range. A 2014 Duster I4 1.6L PE (Base) with 152,000 km sold for 16,000 SAR on 2023-08-18, which is slightly higher due to lower mileage. Considering these, the target car's price should be slightly above 15,000 SAR but below 16,000 SAR due to its mileage and condition. The listed price of 20,000 SAR is higher than actual selling prices, confirming the estimate should be lower.