To estimate the price of the 2016 Nissan Patrol Safari I6 4.8L Safari A/T (Mid) with 263000 km mileage, I analyzed the listed prices of similar cars. The closest match is a 2016 Nissan Patrol Safari I6 4.8L with the same variant and mileage listed for SAR 72000. Another similar car with slightly higher mileage (281000 km) is also listed for SAR 72000. Considering these listings, the average price is SAR 72000. However, other listings for similar models with higher mileage and different variants range from SAR 56000 to SAR 82500. Given the condition and mileage of the target car, I estimate the market price to be slightly lower than the average listed price to account for negotiation and actual selling conditions.