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PASJDIn my opinion, while this is a bit circular, the reason slabbed cards are worth more is that they are essentially commodities in terms of resale value. My PSA 8 Mantle is worth the same (except perhaps to some lunatics who inexplicably want to overpay for the privilege of buying in an auction) as Bill Mastro's PSA 8 Mantle. Not at all so with a raw EX/MT card, no matter how good a scan you post, at least some bidders will be cautious or deterred because they will fear alteration, overgrading, hidden wrinkles, and so forth. And the price you will get depends at least in part on who you are -- confidence factor mentioned above.