To estimate the price of the 2021 GMC Yukon V8 5.3L GLS AT4 (Mid+), I considered several data points. First, I looked at the selling prices of similar cars. The 2022 GMC Yukon AT4 V8 5.3L with 38,000 km sold for 237,000 SAR on 2024-03-04, and the 2022 GMC Yukon V8 6.2L AT4 with 20,000 km sold for 250,000 SAR on 2024-03-27. These cars are newer and have lower mileage, so their higher prices are expected. The 2019 GMC Yukon V8 5.3L SLE with 175,000 km sold for 106,000 SAR on 2024-03-07, and the 2021 GMC Yukon V8 5.3L SLE with 21,000 km sold for 183,000 SAR on 2024-04-24 and 2024-04-25. The listed prices for similar cars include a 2021 GMC Yukon V8 5.3L GLS AT4 with 142,706 km listed for 184,000 SAR and another with 121,000 km listed for 215,000 SAR. Considering the car's mileage of 142,706 km and its condition, I adjusted the price downwards from the listed prices and compared it with the selling prices of similar models.