I recommend purchase of these stamps, especially the two scarcer ones and the block. I believe that #76 and 77 have been neglected because they are surcharge varieties- after all, who cares about surcharge varieties except for anal retentive specialists? This attitude tends to diminish as demand for a particular country's stamps develops. As with all surcharges, I advise purchasing them conditional on obtaining expertization. Note that poor centering is typical for this issue, so attempt to purchase examples that are centered F-VF or better.
With a population of about 31 million, Canada is one of the world's wealthiest countries, and is one of the world's top ten trading nations. GDP growth has averaged 2.2% over the past five years, which takes into account the 0% growth of 2009 due to the global financial crisis. Canada's population is expected to age significantly over the next decades. Canadians over 60 are projected to increase from 16.7% of the population in 2000 to 27.9% in 2025, and 30.5% in 2050. Consequently, in the future, many more Canadians will be spending time working on their stamp collections on cold winter days.