{
  "url": "https://www.moonstonehq.com/articles/the-eight-to-one-stamp",
  "slug": "the-eight-to-one-stamp",
  "title": "The Eight-to-One Stamp: What a CGC 10 Is Actually Worth in PSA Terms",
  "summary": "The same Entei promo, the same gem grade, two labels: $1,171.86 in a PSA slab, $145.25 in a CGC one. We ran the comparison across every card where both graders have real tape. The median CGC 10 fetches about 47 cents on the PSA 10 dollar, and the spread between the widest and narrowest gaps is a map of where PSA's gate actually binds.",
  "section": "Data forensics",
  "published": "2026-08-30",
  "readMinutes": 7,
  "publisher": "moonstone",
  "findings": [
    {
      "value": "8.07x",
      "measures": "Entei PSA 10 vs CGC 10",
      "basis": "$1,171.86 on 34 comps vs $145.25 on 116"
    },
    {
      "value": "107",
      "measures": "cards with both graders' tape",
      "basis": "10+ verified comps on each ten"
    },
    {
      "value": "2.11x",
      "measures": "median PSA-over-CGC ratio",
      "basis": "a CGC 10 fetches ~47 cents on the PSA dollar"
    },
    {
      "value": "3",
      "measures": "cards where CGC 10 wins",
      "basis": "104 of 107 pay more for the PSA label"
    }
  ],
  "tables": [
    {
      "title": "The widest and narrowest gaps, both graders 10+ comps",
      "columns": [
        "Card",
        "PSA 10 (comps)",
        "CGC 10 (comps)",
        "Ratio"
      ],
      "rows": [
        {
          "Card": "[Entei](/card/basep-34), Wizards promos",
          "PSA 10 (comps)": "$1,171.86 (34)",
          "CGC 10 (comps)": "$145.25 (116)",
          "Ratio": "8.07x"
        },
        {
          "Card": "[Snorlax](/card/swsh11.5tg-TG10), [Lost Origin TG](/set/lost%20origin%20trainer%20gallery)",
          "PSA 10 (comps)": "$625 (144)",
          "CGC 10 (comps)": "$87.12 (33)",
          "Ratio": "7.17x"
        },
        {
          "Card": "[Jolteon V](/card/swshp-SWSH183), SWSH promos",
          "PSA 10 (comps)": "$1,462.49 (27)",
          "CGC 10 (comps)": "$239.20 (14)",
          "Ratio": "6.11x"
        },
        {
          "Card": "[Espeon & Deoxys GX](/card/smp-SM240), SM promos",
          "PSA 10 (comps)": "$4,350 (76)",
          "CGC 10 (comps)": "$763.98 (23)",
          "Ratio": "5.69x"
        },
        {
          "Card": "[Flareon V](/card/swshp-SWSH179), SWSH promos",
          "PSA 10 (comps)": "$1,325 (26)",
          "CGC 10 (comps)": "$255 (12)",
          "Ratio": "5.20x"
        },
        {
          "Card": "[Raichu IR](/card/sv02-211), [Paldea Evolved](/set/paldea%20evolved)",
          "PSA 10 (comps)": "$821.50 (148)",
          "CGC 10 (comps)": "$199.99 (17)",
          "Ratio": "4.11x"
        },
        {
          "Card": "[Espeon VMAX](/card/swsh8-270), [Fusion Strike](/set/fusion%20strike)",
          "PSA 10 (comps)": "$630.85 (304)",
          "CGC 10 (comps)": "$490 (20)",
          "Ratio": "1.29x"
        },
        {
          "Card": "[Mega Lucario ex](/card/me01-179), [Mega Evolution](/set/mega%20evolution)",
          "PSA 10 (comps)": "$383.93 (874)",
          "CGC 10 (comps)": "$359.99 (66)",
          "Ratio": "1.07x"
        },
        {
          "Card": "[Umbreon VMAX](/card/swsh7-215), [Evolving Skies](/set/evolving%20skies)",
          "PSA 10 (comps)": "$4,199.50 (425)",
          "CGC 10 (comps)": "$4,025.50 (37)",
          "Ratio": "1.04x"
        },
        {
          "Card": "[Victini](/card/sv10.5b-171), [Black Bolt](/set/black%20bolt)",
          "PSA 10 (comps)": "$1,400 (320)",
          "CGC 10 (comps)": "$1,427.50 (24)",
          "Ratio": "0.98x"
        },
        {
          "Card": "[Pikachu IR](/card/sv03.5-173), [151](/set/151)",
          "PSA 10 (comps)": "$141.50 (317)",
          "CGC 10 (comps)": "$170 (81)",
          "Ratio": "0.83x"
        }
      ]
    }
  ],
  "charts": [],
  "sections": [
    "The study: every card where both graders have real tape",
    "The gap is a photograph of PSA's gate"
  ],
  "method": [
    "All medians are verified sold comps from the moonstone graded tape through August 29, 2026, latest snapshot per card and grade; the 107-card study requires 10+ comps on both graders' tens from the live report payloads on our book as of August 29, 2026, the 272-card extension requires 5+ on the daily graded-snapshot table. Ratios divide sold medians by sold medians, never asks. Comp windows per grader can differ by days; on fast-moving cards that adds noise either direction. Crossover pass-through rates are attributed as historical grader behavior, not measured on our tape. Re-verified 2026-09-22 by an independent recomputation against production. Every row of the table reproduces to the cent and to the comp against the August 28-29, 2026 graded snapshots, as does Entei's 4.6% lifetime gem rate on 1,029 tens of 22,376, and the 272-card extension returns the same median 2.15x, the same 65 cards at 3x or more, the same 16 at 5x or more and the same 17 inversions. One qualification the table owed: it ranks within the 107-card dossier study, not the whole tape. On the wider graded-snapshot set at the same 10-comp gate, the [151 Ivysaur](/card/sv03.5-167) sits between Entei and Snorlax at 7.79x, so Snorlax is second-widest in this study rather than on our book. The 107-card study itself draws on live report payloads that are refreshed in place, so its median, mean and 3x count cannot be recomputed at the article's date. Not financial 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."
}