My father collected stamps starting in the mid 1930s. I did for while from maybe ages 8-15.
After my father died I took the collection to a stamp dealer and he offered $250. I don’t know if it was worth more, but I took the money. Otherwise it would just be collecting dust in the basement.
My father had an official “Ivory Soap Stamp Collector’s Book.” There were spots to attach stamps from all over the world. The Africa section was fascinating because many of the current countries didn’t exist but were labeled such as British East Africa (Kenya, I presume), The Gold Coast (Ghana?), German Southwest Africa (Namibia), and similar.