Tunisian dinar
It is a criminal offence in Tunisia to import or export dinar. Every year, each citizen can convert into foreign currency up to 6,000 Tunisian dinars before departure from the country. Therefore, prices at duty-free shops are in convertible currencies such as euros, US dollars and British pounds. There are many converting ATMs in the country for tourists.
Tourism in Tunisia
According to Garrett Nagle in his book Advanced Geography, Tunisia's tourist industry "benefits from its Mediterranean location and its tradition of low-cost package holidays from Western Europe." The development of tourism dates back to 1960 through the joint efforts of government and private groups. In 1962, tourism, with 52,000 entries and 4,000 beds, had a revenue of two million dollars and becomes the main source of foreign exchange in the country. 
Tunisia is also an attractive destination for its huge number of important festivals. The majority of these festivals occur in summer such as International Festival of Carthage which is the most important festival in the Arab world hosting stars and bands from all over the world, and Tabarka Jazz Festival.