This paper considers the Swedish regulations of purchase taking the perspective of private persons as a starting point. The law of purchase from the year 1990 is applicable on a number of legal purchase situations where the contracting parties varies. Nevertheless, the law is mainly focused on the purchase between businessmen. This places private persons on level with businessmen, since they are given equal responsibility regarding legal knowledge and the drawing up of contracts. In order to get a deeper knowledge of the law of purchase and to reach an understanding of how it should be interpreted we have studied the government bill on the law, cases from the Supreme Court, doctine on the area and legal articles. The purpose with this paper is to examine whether the law of purchase from the year 1990 is too old to be applicable on private purchases today.