— Hold· thin volume
PSA pop · this parallel
10
Card # 21b⇄ 21AAdam Bomb
GPK Price Guide Value iGPK Price Guide Value is a recency-weighted market value from REAL sales of this exact card+grade (recent comps count most, outliers stripped) — steadier and harder to game than a single 'last sale', which can be one lucky auction or a shill bid. When a card has few or no recent comps, we estimate transparently from its own older sales, its other grades, and comparable cards (same subject/set/rarity tier), factoring subject trend and scarcity — and we LABEL it as an estimate until real sales arrive.
$55
PSA 10 · highest-graded comp
🟢 lowest on eBay: $105.45 all-in
🛒 2 listings on eBay now PSA 10 SLAB
RAW (UNGRADED) — NOT A GRADED VALUE
$1
7 raw sales used for this value view raw sales →
● real comps ● est. — own older sales ● est. — never sold ● unsold
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.
DatePriceGradeCertType
Loading…

🗑️ The Garbologist says…

Cooling Off
The Garbologist popped the lid on this card.
  • 3 recorded sales · 0 in the last year · trades only a few times a year · limited-confidence sample.
  • Its last few sales went $55 → $31 → $20 — a steady drift lower.
  • Median moved -54% across the window ($55 → $25).
  • Heads up: the last recorded sale ($20 on 2025-07-03) landed 64% below our current value — weigh it as a single data point.
  • Net-net, the heat is coming off — recent sales are softening. Could be a breather, could be a top; the trash doesn't say which.

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.

Booger Billy — across every card

Subject page →
Every Booger Billy card we track — how the character is moving, not just this one grade.

🧬 Should I slab it?

SAVE YOUR MONEY

Only a 51% gem rate on the 2020 GPK PSA pop (all sets that year) - graded pop is self-selected (best copies get submitted), so a random raw likely grades lower. Expected ~$36 before the $80 PSA fee (fee only - excludes shipping & insurance), ~$-44 after - near or below a raw copy ($1 from 7 raw sales). Not worth grading unless you are confident it is a 10.

Gem (PSA 10) rate
51%
2020 GPK, all sets · 94,934 graded
PSA 10 value
$55
if you hit the ten
Grading cost
$80
PSA Regular tier
Expected after grade
$-44
vs raw $1 from 7 raw sales

Probability-weighted across grades using PSA population (2020 GPK, all sets) as a proxy for cut & print quality, minus the grading fee. A guide, not a guarantee — centering and eye-appeal on your specific copy decide the grade.

GPK Price Guide
← Back Follow GPK Price Guide on FacebookNew sales, price moves and daily postsFollow