You might be good at estimating a car's value, but are you also good at guessing what people would be willing to sell their car for? Find someone on the street next to their car and estimate what they would be willing to sell it for.
Make an audio recording where you first state the car type and your price estimate, then have the car owner respond with what they are actually willing to sell the car for. If you get it right, you earn 2 extra points in this challenge.