It is a symbol of vanity and superficiality. You may be concerned about your image and the way you present yourself to the world. Some say that if you see a clear image, you may be getting a glimpse of your true self. Broken mirrors always seem to be a sign of bad luck, or, at least, represent some distortions. On a deeper level the mirror can be considered to be a representation of the intellect.
The intellect is an instrument of navigation and is constantly persuading us to identify ourselves. When we think about this, it makes a lot of sense. Our self-identity is very much connected to the way we look (not only superficially but also characteristically as man - woman, young - old, etc). We use this self-identity, which is greatly a production of our intellect, to navigate through life. ... The Bedside Dream Dictionary
Selling is all about persuasion and buying is all about acceptance. Selling is about persuading people to have things they did not know they needed, so you need to bear that in mind if an item is up for sale in your dream. Street peddlers, hawkers or door-to-door salesman are all symbols of possible dishonesty; if they appear in your dream, you should weigh up the pros and cons of some new undertaking or the motives of someone close to you. Trading in dreams symbolizes interaction and communication and if this image appears in your dream, you may be considering what personal qualities you have to offer someone or what they have to offer you.... The Element Encyclopedia