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ChadThat helps. I think as I delve deeper into this, what I'm going to need to decide is how much the value of a card I'm about to purchase is tied into the card, and how much is tied into peripheral things--is it graded? who's it graded by? is it a card from a set with intense set registry competition and so on. And then, even further, are the perpiheral elements that give a card its value going to hold for the long term. People have collected cards for decades and I don't think people are ever going to stop, but will people get disinterested in registries etc.? I don't know. It's intereting, tho. It's much more complicated than when I was a kid, but I'm ok with that. I'm all grown up now. (Sort of.) 
--Chad