It's wrong to try to deceive other people.
Jack is the owner of a used car with many problems and tries to sell the car.
Jack wants to sell his used car.
Jack fully discloses all the issues with the used car before making the sale.
Jack avoids mentioning any problems with the used car throughout the sales process.
The person who buys the car is aware of the problems and has no issues paying Jack for the car.
The buyer of the used car files a lawsuit against Jack for selling him a bad car.