To estimate the price of the 2016 Toyota Hilux I4 2.7L GLX Single Cab 4WD (Mid++), I considered the listed prices of similar cars. The closest match is the 2016 Toyota Hilux I4 2.7L GLX Double Cab 2WD (Mid) with 183500 km listed for SAR 61000. Given the higher mileage of 289500 km for the target car, I adjusted the price downwards. Other relevant data points include a 2016 Hilux with 245000 km listed for SAR 59000 and a 2016 Hilux with 212000 km listed for SAR 60000. Considering the higher mileage and average condition of the target car, I further adjusted the price downwards. The 2014 Hilux with 275000 km listed for SAR 36500 also influenced the final estimate.