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runscottThe Piedmont 350-460 series comes in two factory designations: 25 and 42. Factory 25 does NOT command a premium, but factory 42 generally commands about a 4-5X premium. Your original post was both correct and helpful.
Another note: If the factory 42 card is a HOF'er, it demands much less of a premium. Same is true for other tough t206 backs.