To estimate the price of the 2021 Mercedes GLS450 I6 3.0L Twin Turbo (Hybrid) Top, I started by looking at the price of a new 2025 Mercedes-Benz GLS 500 4MATIC, which is SAR 498790. Given that the car in question is a 2021 model, I applied a depreciation rate of 10% per year. Over three years, this results in a depreciation of approximately 27.1%, bringing the estimated value of a new 2021 model to around SAR 363,700. Next, I considered the listed price of a similar 2022 Mercedes GLS450 V6 3.0L Twin Turbo (Standard) with 38055 miles, which is SAR 415000. Given that the car in question is a higher trim (Top) and has higher mileage (50000 miles), I adjusted the price downwards. Factoring in these adjustments, I arrived at an estimated market price for the car.