To estimate the price of the 2021 GMC Yukon SLE V8 5.3L with 34000 km mileage, I primarily considered the selling prices of similar cars. The most relevant data point is a 2021 GMC Yukon SLE V8 5.3L with 21000 km sold for 183000 SAR in April 2024. Given the additional 13000 km on the car in question, I adjusted the price downwards slightly. Other data points include a 2019 GMC Yukon SLE V8 5.3L with 175000 km sold for 106000 SAR, which is less relevant due to the significant mileage difference. The listed price of a similar car was 194000 SAR, but this is typically higher than the actual selling price. Considering these factors, I estimated the market price accordingly.