The one flaw in the concept is the issue of ease of sale/shipping costs/listing fees etc. The total value of individual cards will clearly add up to more than the set, but the likelihood of selling every single common card from the entire set is not a given.
If you have the time and patience to wait for years before you unload the entire set card by card then go for it. Or you can sell the set at one time and walk away with cash in your pocket.
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