The reason why we go shopping with familiar people is more an emotion of mutual trust. Anyway, it's shopping. It must be a business to take care of acquaintances. Emotion and reason are the way to survive. Merchants also understand that as long as the surface makes you feel that you are not deceiving you, you will buy it. For buyers who are not acquaintances. Merchants know that once they can't reach the buyer's price, their business will be ruined, so they will choose the right shot.