To estimate the price of the 2013 Ford Explorer V6 3.5L V6 (AWD) (Base+), we start by looking at the new car prices for different variants of the 2025 Ford Explorer. The closest variant in terms of engine size and AWD feature is the 3.3L EcoBoost Base (AWD) priced at SAR 175835. Given that the car in question is a 2013 model, it is 11 years old. Assuming a 10% depreciation per year, the depreciation factor is 0.9^11, which is approximately 0.313. Applying this depreciation factor to the new car price: 175835 * 0.313 = 55036. The car has high mileage (280000 miles) and is in average condition, which would further reduce its value. Considering these factors, we estimate the market price to be around SAR 40000.