— Hold · next 3 monthsUp from about $141 to $170, in step with its set. Cards in this spot have risen about 4% over the next 3 months (5,094 past cases).
PSA pop · this parallel
147
Card # 41a⇄ 41BJoltin' Joe
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.
$178
PSA 9 · this grade▲ +38%
PSA 10 comp $947
no PSA 9 listed on eBay right now
RAW (UNGRADED) — NOT A GRADED VALUE
$20
128 raw sales used for this value view raw sales →
● real comps ● est. — own older sales ● est. — never sold ● unsold
Price history · PSA 9
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
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🗑️ The Garbologist says…

Trending Up
Straight from the Garbologist's clipboard:
  • 57 recorded sales · 11 in the last year · trades every few months · high-confidence sample.
  • The recent trail reads $144 → $150 → $120 → $170 → $202 — a clear march higher.
  • Median moved +38% across the window ($100 → $160).
  • Census check: PSA has graded 550 of this card, and only 4.2% come back a 10 — a genuine condition rarity.
  • Net-net, the momentum points up — real buyers are paying more, more often. Not a promise, just what the garbage is telling us.

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.

Mean Gene — across every card

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

🧬 Should I slab it?

SLAB IT

About a 4% gem (PSA 10) rate on this card's own PSA pop - graded pop is self-selected (best copies get submitted), so a random raw likely grades lower. Expected value ~$131 before the $80 PSA fee (fee only - excludes shipping & insurance), ~$51 after, vs a raw copy around $20 from 128 raw sales. Grading pencils out here, especially if you hit the $947 ten.

Gem (PSA 10) rate
4%
this card · 547 graded
PSA 10 value
$947
if you hit the ten
Grading cost
$80
PSA Regular tier
Expected after grade
$51
vs raw $20 from 128 raw sales

Probability-weighted across grades using PSA population (this card) 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
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