Here is the simplistic analysis, as there are multiple factors at play - Supply and demand affect vintage card prices just like any other good. The 12+ year bull market has increased disposable income. The increased disposable income has brought more people into or back into the hobby, as well as increased budgets for the existing hobby members.
The increased collector numbers have increased vintage’s demand. The increased demand has skyrocketed prices. That is the macroeconomic analysis.
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