Gibbons includes what Scott calls New Britain under New Guinea, combined with other cheaper issues. So the escape clause is what catalog you use or your own interpretation of the events at the time of issuance.
Another tough place would be Vancouver Island.
I have started such a "Every Country" collection and plan on drawing a map, giving brief historical details and showing the coolest inexpensive stamps I can find, even if the classics have faults that don't detract too much.
I recently got these Australian states on
ebay, all four for less than $30 total. The faults are acceptable to me at that price. These I consider "cool" stamps. Generally stamps that Rod222 shows are cool

