Bride-buying, also referred to as bride-purchasing, is the industry or trade of purchasing a bride as a form of property. The wife is exchanged for a sum of money, or for other products. It is still practiced in parts of China, India and Africa. It is illegal in many countries. It is described as a marriage of convenience. The people do not marry because they feel love or affection for each other, but they marry because one person gets an advantage by doing this. A common form of bride-buying is the Mail-order bride.