Assume that a neighbor whom you rarely see places a "for sale" sign on her car, offering to sell it for $6,000. You learn that she is moving to another state and needs the extra cash to help finance the move. You know that she could easily get $10,000 for the car, and you are considering purchasing it and then reselling a profit. But you also discover that your neighbor is completely unaware that she has priced the car significantly below its Blue Book value. Are you ethically obligated to tell her that she is essentially giving away $4,000 if she sells you the car for only $6,000?