✔ 最佳答案
doing some research, better visit
http://www.hongkongpost.com.
take about you like stamps collecting since primary school. because your father interest and you like there were many kind of style, different country had different stamp, some of stamps are valued and high cost. after serveral years, a 50cents stamps may become 500 dollars in value.
you hope it can let my friends like that and share with you as well as collecting yourself only.