What are the different types of memorabilia and special inserts (e.g., autographs, costume cards) found in non-sport trading card sets, and how do they impact the overall appeal and value of the cards?

What are the different types of memorabilia and special inserts (e.g., autographs, costume cards) found in non-sport trading card sets, and how do they impact the overall appeal and value of the cards?
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