The car to be estimated is a 2020 Bentley Bentayga 3.8L Diesel, which is not a common variant in the data provided. We have a 2020 Bentley Bentayga 4.0L V8 listed for AED 390500 and a 2019 Bentley Bentayga 6.0L W12 listed for AED 399000. The 2020 V8 is closer in year and engine size, so it is more relevant. The classified ad prices for 2020 models with similar mileage range from AED 399990 to AED 679000, but these are generally higher than actual selling prices. Considering the depreciation from the new car price of a 2025 V8 model starting at AED 860000, a 10% annual depreciation over 4 years would suggest a value around AED 560000. However, given the non-GCC spec and average condition, a further reduction is warranted. The closest listed price of AED 390500 for a 2020 V8 with similar mileage is a strong indicator, but considering the diesel variant and non-GCC spec, a slightly lower estimate is reasonable.