I have been trading coins with a friend in the US for serveral years now.
Towards the end of last year, he sent over a 7070 type set album with spots for 74 coins.
I finally got around to seeing how many coins that I have for the set and discovered that I could quickly fill 36 holes. I probably will never complete the set since two of the coins for the set in even the lowest grade go for over $240.
I could fill three more holes if I decided to break up some coins that I have in US mint packaging but I am not going to do that yet.
Ken