The main markets of bigger camps usually offer electronics, groceries, hardware, medicine, food, clothing, cosmetics, and services such as prepared food (restaurants, coffee–tea shops), laundry, internet and computer access, banking, electronic repairs and maintenance, and education. Some traders specialize in buying food rations from refugees in small quantities and selling them in large quantities to merchants outside the camp. Many refugees buy in small quantities because they do not have enough money to buy normal sizes, i.e. the goods are put in smaller packages and sold for a higher price.