I have a hobby of collecting stamps. I pursued this hobby when I was in high school. The used stamps that I obtained came from correspondence between my parents and other people. In addition, I obtained stamps by buying them at the post office. However, the hobby of collecting stamps or philately had been empty because of my various activities. I also rarely hunt for stamps. Fortunately, in this era, I can buy used stamps through e-commerce in online stores. Here are some of my stamp collections.
This stamp from Burkina Faso was issued in 1985 about Armillaria mellea. This stamp is from the Fungi series. The price of this stamp is 150 f per sheet.
Chinese stamp issued in 2002 about Waves: Protection of the Oceans. The stamp is from the Environmental Protection series. The price per sheet is 1.5 ¥.
A 1976 stamp from the Netherlands depicting Queen Juliana is selling for 55c each.
This stamp is from North Korea issued in 1995. It depicts the White Rhinoceros from the African Fauna series. The price per sheet is only 3₩.
This 1968 Danish stamp tells the story of the Coat of Arms. Price per sheet is 1dkr.
A 1975 German stamp depicting industrial and technological progress.
Hungarian stamp depicting physicist Ignac Semmelweis (1818-1865).
A stamp from Benin issued in 1999, Brown Hyaena, from the Wildlife series.
All the stamps above I bought in online stores at cheap prices. But I am a little doubtful of the authenticity of the stamps because the prices are too cheap. Nevertheless, I still collect the stamps because they can increase my personal insight. I include the photos of the stamps above in the #monomad daily challenge curated by 
