To estimate the price of the 2021 Lexus LX570 Super Sport V8 5.7L Sport (Base) with 122500 km mileage, I first looked at the selling prices of similar cars. The 2019 Lexus LX570 Signature Black Edition V8 5.7L with 153400 km sold for 337000 SAR and 313000 SAR in late 2023. These cars are of a higher trim (Signature Black Edition) and older, so the price for the 2021 model should be higher. Next, I considered the listed prices of similar cars. The closest match is a 2021 Lexus LX570 Super Sport V8 5.7L with the same mileage listed for 341500 SAR. Other listings for 2021 models with lower mileage and higher trims range from 358500 SAR to 420000 SAR. Given the car's condition and mileage, I adjusted the price slightly lower than the listed price to account for negotiation and market conditions.