This has been discussed ad nauseum. At least on cards, there is no clear cut answer, there are many top tier auction houses to choose from and none is necessarily more likely to get a better price on any given card than any other.
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Net 54-- the discussion board where people resent discussions. 
My avatar is a sketch by my son who is an art school graduate. Some of his sketches and paintings are at
https://www.jamesspaethartwork.com/
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