S74 Silks: Up, Down, or Who Cares?
Recently got interested in the silks for first time but a little hard to figure them. I get that they come in two types, with white background and with colors; and the whites have paper backings while the colored do not. I know that Old Mill and Turkey Red are most common backs. But why are so few graded? Is one type more rare than the other? Is their value going up or down? Are they not graded because they will be judged harshly or because people want to "feel" them? Are they inevitably creased from being folded or is that mainly the ones with no backing? Thanks for any tips.
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