I would think that a "perfect" market would only be possible if all potential buyers of a card were aware and able to place a bid if the card comes up for auction. This is obviously impossible unless there is a single marketplace - which will likely never happen in this hobby.
Regarding price guides, this has been the case for at least a decade... people are finally starting to realize it. That said, the dealers who pull out a catalog at a show to give you a price are still plentiful.
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