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moonstone is independent research and market data, not financial, investment, tax, or legal advice. Prices are real recorded transactions and live market data, USD only. Collectibles are speculative, illiquid, and volatile and can lose value; past performance is not indicative of future results. See the full disclaimer. Pokémon and its trademarks are the property of their respective owners; moonstone is not affiliated with or endorsed by Nintendo, Creatures, Game Freak, or The Pokémon Company.

Set screenas of 2026-09-26

Diamond & Pearl

One set, four readings of undervaluedevery figure recordedOpen in the screener
Cards130
Priced130
Median raw ask$1.15
With PSA 10 tape0
Median PSA 10 premium—
Set median, 90d+1.1%

Pick the reading

PSA premium spread0Cohort laggards30Gem rate vs price19Distance from peak9

Which Diamond & Pearl cards carry the widest gap between the raw ask and the PSA 10 sold median, on 5 or more verified comps? A wide gap is where grading adds the most, and where a raw copy in gem-ready condition is priced as if it were not.

PSA premium spread

0 of 130 qualify

PSA 10 verified sold median over the raw ask, cards with 5 or more verified PSA 10 comps.

Nothing clears the rule

No Diamond & Pearl card carries the recorded figures this reading needs. That is a statement about our tape, not about the set: the other readings may still hold rows.

How to read it

Raw is the canonical printing's TCGplayer ask, the same figure the card page shows. PSA 10 and PSA 9 are eBay sold medians verified per listing, printed with their comp counts; a premium is only computed on 5 or more PSA 10 comps.

Gem rates come from the PSA registry snapshot and are only trusted on lines of 100 or more slabs; a zero beside a real population is a provider gap and is withheld, never shown as 0%. Moves and highs come from each product's own recorded series, trimmed at the price-rule change of 2026-09-07, and ignore cards under $5.

Every figure carries its sample. A short series, a thin comp count or a small registry is printed beside the number rather than hidden, and a card that lacks the figure a reading needs is left off that reading instead of scored on a guess.