To estimate the price of the 2020 MG RX8 I4 2.0L Turbocharged Luxury (Top) with 55083 km mileage, I focused on the selling prices of similar cars. The most relevant data point is a similar Luxury (Top) variant with 82000 km sold for 37000 SAR on 2024-09-06. Another Luxury (Top) variant with 76000 km sold for 52000 SAR on 2024-04-27. Considering the target car's lower mileage and average condition, its value should be higher than 37000 SAR but likely lower than 52000 SAR. The listed prices for similar cars ranged from 40000 SAR to 62500 SAR, but these are typically higher than actual selling prices. Therefore, I estimate the market price to be slightly above the lowest recent selling price for a similar variant.