Passion of collecting post stamps has lasted uninterruptedly since the middle of 19th century, when the first post stamp was issued in Great Britain. Today it is perhaps one of the most popular hobbies all over the world. The subjects depicted in the stamps are various: some depict fauna and flora, others the profiles of well-known people or some architectonic edifices. Nevertheless, it is a must to say that collecting is quite an expensive hobby: the value of the most expensive stamps in the world exceeds million of American dollars.