About the game
Running a small used-car lot is the whole job in Car Dealership. You buy cheap vehicles to fill your lot, then look each one over before you decide what it is worth. The neighborhood and the wider car market give you the numbers to compare against.
Profit from a sale goes straight back into the business: more cars to stock and a better showroom. Pick badly and the money you needed for the next purchase is gone, so the checking part is where the game bites. Compare your car with what else is around before you name a price.