To estimate the price of the 2018 Chevrolet Tahoe LT V8 5.3L LT 4WD (Mid) with 291000 km mileage in average condition, I considered several data points. The closest match is a 2018 Chevrolet Tahoe LT V8 5.3L LT 4WD (Mid) listed for SAR 98500. However, listed prices are generally higher than selling prices. I also looked at similar models: a 2016 LT 4WD (Mid) with 127000 km sold for SAR 90000, a 2016 LT 4WD (Mid) with 182000 km sold for SAR 84500, and a 2017 LT 4WD (Mid) with 49000 km sold for SAR 124000. Considering the higher mileage and average condition of the target car, I adjusted the price downwards. The 2017 Z71 4WD (Top) with 311000 km sold for SAR 66000, which is a lower trim but has higher mileage. Factoring in these comparisons, I estimated the market price accordingly.