This card30d 90d 1y All-time
Big Mark #gpk-29 Mark McGwire 2026 Garbage Pail Kids Bowman Chrome Bowman GPK · PSA 10
Scarcity2 parallels: print runs and odds
PSA pop—reported at other varieties of this card
PSA 10 · 2026 Bowman Chrome Bowman GPK →
Never sold — estimate
PSA pop · this parallel
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Card #
All grades · value and PSA population
🛒 3 listings on eBay now RAW
RAW (UNGRADED) — NOT A GRADED VALUE
$522
28 raw sales used for this value
view raw sales →
Front
Back
Price history · PSA 10
On-the-record sales go back as far as PSA reports them — late 2017 for GPK — plus eBay-tracked and raw sales as they land.
🗑️ The Garbologist says…
Too Thin To Call
The Garbologist has been digging through this one's trash.
- Nobody's actually sold this exact card and grade on record, so there's no live market to read — the price you see is a modeled estimate, not a realized sale.
- With this little to go on, the honest answer is we can't call a direction — one auction would swing the whole read.
Automated analysis generated from this card’s real recorded sales and PSA population data — no opinions, no predictions guaranteed. Entertainment and research only, not financial advice.
Big Mark· Mark McGwire — across every card
Subject page →Every Big Mark card we track — how the character is moving, not just this one grade.
🧬 Should I slab it?
Grade itOnly about 1 in 3 copies of 2026 GPK cards get a 10; across every grade, a graded copy should be worth about $1,073, more than the $161 it costs to grade plus the $522 raw copy you give up.
Expected value if graded$912 (after $161 all-in cost)
Raw value today$522 (from 28 raw sales)
VerdictGrade it
Break-even: you need about a 2% chance of a PSA 10 (all 2026 GPK cards: 33%).
Chance of a PSA 10
33%
all 2026 GPK cards · 251 graded
PSA 10 value
$1,991
today · ~$1,991 by Feb 11, 2027
PSA 9 value
$662
today · ~$662 by Feb 11, 2027
All-in cost
$161
PSA fee $80 + shipping both ways $42 + likely upcharge $39
How these numbers work
All-in cost $161: PSA Priority tier fee $80 per card (expected $119 with PSA's upcharge if it comes back worth more than the tier allows), insured shipping to PSA ~$12, PSA insured return shipping ~$30. Sending it to your PSA Vault instead skips return shipping (vault intake and storage are free): ~$131 all-in, so a graded copy would net ~$942.
Grade odds (all 2026 GPK cards, 251 PSA-graded): 10 · 33%, 9 · 49%, 8 · 16%, 7 or lower · 1%. People send their best copies, so a random raw copy usually grades a bit lower.
Values when it comes back (~95 days, about Feb 11, 2027): today's values (the set has no clear 3-month trend).
Expected value if graded = each grade's chance × its value, minus the all-in cost. A guide, not a guarantee — centering and corners on your copy decide the grade.
Grade odds (all 2026 GPK cards, 251 PSA-graded): 10 · 33%, 9 · 49%, 8 · 16%, 7 or lower · 1%. People send their best copies, so a random raw copy usually grades a bit lower.
Values when it comes back (~95 days, about Feb 11, 2027): today's values (the set has no clear 3-month trend).
Expected value if graded = each grade's chance × its value, minus the all-in cost. A guide, not a guarantee — centering and corners on your copy decide the grade.
