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' to the Forum SilverNcoin, regarding Newfoundland coin prices vs Canadian coin prices for the same years, price is not always determined by mintage. It is determined by demand and to some extent by scarcity. The number of collectors of Canadian coins is greater than collectors of Newfoundland coins, creating more demand for Canadian coins. There may have been a smaller mintage of Newfoundland coins vs the Canadian but that does not mean there are less available.
In the late 1800's there was a bank failure in Newfoundland, as a result there was a major mistrust of banks and the people hoarded coins rather than depositing in banks. This resulted in an abundance of Newfoundland coins, which gives us the lower price of them today, compared to their Canadian equivalents.
https://en.wikipedia.org/wiki/Black_Monday_(1894)