I agree with Jon. Pre-1970 or 1980 cards will be a store of value, with cards of the iconic Hall of Famers having the best chance for appreciation (though appreciation among this subset is still uncertain given that newer generations will not have grown up collecting cards). I also agree with Jon that vintage game used material of iconic Hall of Famers, particularly that with strong provenance, is undervalued and has the best opportunity for future appreciation. These items are pieces of history, that bring you as close to the game as possible, are of very limited supply and with likely high continued demand (including among those that love baseball but may not have collected cards). Some items are also one of a kind. I collect both cards and game used but have become much more interested in game used given the uniqueness and historical nature of some of this material.
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