To estimate the price of the 2018 Infiniti Q50 I4 2.0L Sport (Top) in bad condition with 141000 km mileage, I considered the following data points: 1. Selling prices: A 2017 Infiniti Q50 S V6 3.0L Twin Turbo Red Sport 400 (Top+) with 9700 km sold for SAR 95000 in good condition on 2023-12-02. A 2020 Infiniti Q50 V6 3.0L Twin Power Turbo Sensory (Mid) with 85000 km sold for SAR 82000 in average condition on 2024-02-22. 2. Listed prices: A 2017 Infiniti Q50 V6 3.0L Twin Power Turbo Red Sport 400 (Top+) with 139000 km was listed for SAR 75000. A 2019 Infiniti Q50 I4 2.0L Luxe (Base) with 150270 km was listed for SAR 75500. A 2016 Infiniti Q50 I4 2.0L Turbo Luxe (Base) with 115000 km was listed for SAR 58000. Considering the car's bad condition, higher mileage, and the fact that it is a 2.0L I4 variant, I adjusted the price downwards from the listed and sold prices of similar cars.