{
  "url": "https://www.moonstonehq.com/articles/five-cards-in-six-have-only-one-price",
  "slug": "five-cards-in-six-have-only-one-price",
  "title": "Five Cards in Six Trade on a Single Listing",
  "summary": "Across 52,282 card lines, 83.5% have a single listing setting the price: the cheapest copy for sale IS the market, to the cent. Being expensive does not buy you a second seller. Above a dollar the share is flat at 89% to 92% at every price level, including 91.8% of cards over $100. It matters because a quoted price backed by one listing moves the moment that listing sells.",
  "section": "Data forensics",
  "published": "2026-09-21",
  "readMinutes": 7,
  "publisher": "moonstone",
  "findings": [
    {
      "value": "83.5%",
      "measures": "of priced lines where market equals the cheapest listing exactly",
      "basis": "43,654 of 52,282 on September 21, 2026"
    },
    {
      "value": "91.8%",
      "measures": "of cards above $100 with a single price",
      "basis": "flat at 89% to 92% above a dollar"
    },
    {
      "value": "9.6%",
      "measures": "of lines where the cheapest listing is ABOVE the market price",
      "basis": "5,020 lines"
    },
    {
      "value": "3,608",
      "measures": "lines with a genuine gap to read",
      "basis": "7% of the priced lines"
    }
  ],
  "tables": [
    {
      "title": "Share of lines where market price and cheapest listing are identical",
      "columns": [
        "Price band",
        "Lines",
        "Single price"
      ],
      "rows": [
        {
          "Price band": "$100 and above",
          "Lines": "1,787",
          "Single price": "91.8%"
        },
        {
          "Price band": "$25 to $100",
          "Lines": "4,308",
          "Single price": "90.1%"
        },
        {
          "Price band": "$5 to $25",
          "Lines": "9,826",
          "Single price": "90.6%"
        },
        {
          "Price band": "$1 to $5",
          "Lines": "13,499",
          "Single price": "89.3%"
        },
        {
          "Price band": "Under $1",
          "Lines": "22,862",
          "Single price": "75.1%"
        }
      ]
    }
  ],
  "charts": [],
  "sections": [
    "Being expensive does not buy you a second opinion",
    "When the cheapest copy costs more than the market price",
    "Where a gap actually exists, it can be enormous"
  ],
  "method": [
    "Read from our card price tape on day 20717 (September 21, 2026). A line qualifies when both a market price and a cheapest-listing price are present and above zero, which on day 20717 is all 52,282 lines the tape covered that day, out of a 63,838-card catalog. Identical means equal to the cent, not approximately equal. Price bands are cut on the market price. The tape is daily and roughly three weeks deep, so this is a census of one day rather than a trend; the share has not been tracked over time and no claim is made that it is rising or falling. Nothing here is investment advice."
  ],
  "terms": "Figures are moonstone's own recorded measurements, dated as published. Quote them with the population stated beside them. The article at `url` is the human form of this file."
}