Like many others, Dirk-Jan began reading comics as a child. But after picking up another series from the comic book store, he became hooked on collecting. He had a cupboard full of comics in no time at all. He also attended fairs and developed an eye for the more popular comics, awaking his dealer instincts. Dirk-Jan ended up working at the major fairs himself, and helped at the stand of a large comic strip specialist. As a result, he acquired tremendous knowledge about various comics and their value.