— Hold · next 3 monthsNo sale in the last 3 months, so there is no fresh price to read; it stays a hold until it sells again.
PSA pop · this parallel
14
Card # 277b⇄ 277AReuben Cube
GPK Price Guide Value iGPK Price Guide Value comes from real sales of this exact card at this grade, with sales that look wrong set aside. This card has only a few sales at this grade, too few to price it alone, so that is blended with what its other grades and cards like it are selling for. How this one was worked out: Value $13 - priced from 2 sales of this card at this grade (1 in the last 180 days, newest May 2026; recency-weighted, 59% on the recent sales and 41% on its longer history), moving 60% of the way to its older-sales estimate ($11) as the newest sale ages; weighted 50% on this card's own sales and 50% on the estimate from its context ($15: from this card's PSA 10 value ($49, 11 sales, newest Jul 2026) x 0.32 (measured PSA 9/10 curve (gpk_vintage, at $49)); its set: 418 sale-backed other cards, 117 sold as base PSA 9 in the last 180 days, less the measured never-sold discount (21%) ($15); from its own raw (ungraded) sales ($2, 29 sales, newest Aug 2026) x 7.05 (measured raw -> PSA curve)).
$13
PSA 9 · estimate · last sold May 23
PSA 10 comp $49
🟢 lowest on eBay: $55.81 all-in
🛒 1 listing on eBay now PSA 9 SLAB
RAW (UNGRADED) — NOT A GRADED VALUE
$2
15 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…

Too Few Recent Sales
The Garbologist sniffed around the sales pile.
  • 3 recorded sales · 1 in the last year · trades only a few times a year · limited-confidence sample.
  • Its last few sales went $22 → $10 → $12 — choppy but broadly rangebound.
  • Census check: PSA has graded 45 of this card, and only 51.1% come back a 10 — gems fairly readily.
  • None

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.

Blockhead Blake — across every card

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

🧬 Should I slab it?

SAVE YOUR MONEY

Only a 51.1% gem 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 ~$31 before the $80 PSA fee (fee only - excludes shipping & insurance), ~-$49 after - near or below a raw copy ($2 from 15 raw sales). Not worth grading unless you are confident it is a 10.

Gem (PSA 10) rate
51.1%
this card · 45 graded
PSA 10 value
$49
if you hit the ten
Grading cost
$80
PSA Regular tier
Expected after grade
-$49
vs raw $2 from 15 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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