To estimate the price of the 2016 GMC Yukon V8 5.3L SLE (Base) with 129000 km mileage, I considered several data points. First, I looked at the selling prices of similar cars. The 2015 GMC Yukon SLE (Base) with 161000 km sold for 82000 SAR in December 2023, and the 2016 GMC Yukon SLE (Base) with 269000 km sold for 60000 SAR in February 2024. Given the lower mileage and better condition of the target car, it should be valued higher than these. The 2017 GMC Yukon SLE (Base) with 177000 km sold for 86000 SAR in July 2024, which is a closer comparison. Additionally, the listed prices for similar 2016 models were 92500 SAR and 88000 SAR. Considering these factors and the depreciation over time, I estimated the market price accordingly.