To estimate the price of the 2013 Audi A4 I4 1.8L TurboCharged 30 TFSI (Base), I considered several data points. First, I looked at the selling prices of similar cars. A 2013 Audi A4 I4 2.0L Turbocharged with 121910 km sold for AED 21500 on 2024-09-18. This car has a larger engine and is a higher trim (45 TFSI Quattro). Another 2015 Audi A4 2.0 I4 with 119300 km sold for AED 41000 on 2024-02-07, but it is a newer model and higher trim. A 2015 Audi A4 2.0L Turbo I4 with 45300 km sold for AED 36000 on 2024-06-26, which is also a newer model but the same base trim. For offers accepted, a 2013 Audi A4 I4 2.0L Turbocharged with 121910 km had an offer accepted for AED 21000 on 2024-09-22. For listed prices, a 2013 Audi A4 1.8L I4 30 TFSI (Base) with 174500 km is listed for AED 21500. Considering the car's age, mileage, and trim, I adjusted the price downwards from the higher trim and newer models to reflect the base trim and higher mileage.