What is the Difference Between Regular and "X-Out" or "X-Marked" Boxes of 1980s

Does the "X" on the top of the box = "buyer beware" in today's market? If they are valued less than non-Xed boxes, what is the premise behind the valuation here? I have no clue about any of this and am looking for an education. Meatloaf
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Collecting 1970s Topps baseball wax, rack and cello packs, as well as PCGS graded Half Cents, Large Cents, Two Cent pieces and Three Cent Silver pieces.