Who would ever refuse to purchase different things for the half of their price? Many of the marketing campaigns are based on this desire of the people to buy more and pay less. Every person has at least once decided to get the products or clothes with a great discount during the sale period. But often we turn out to be deceived and pay the full price or get the items of a lower quality blinded by the huge labels with the bright signs “50 % off”. What are the rules to buy the things wisely and be economical buying the products on sale. How to see the real discounts and no to back the wrong horse being mislead by the implicit marketing strategies?