— Hold· thin volume
PSA pop · this parallel
6
Card # 289a⇄ 289BAlexander The Grate
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 $17 - estimated from 2 sales, all more than 3 years old, of this card at this grade (newest $11, Apr 2020; moved to today by the measured price change since Apr 2020 of this set (20 cards that sold in both periods, weight 50%) and its product line (533 cards, 50%): +80%); weighted 30% on this card's own sales and 70% on the estimate from its context ($16: from this card's PSA 10 value ($50, 10 sales, newest May 2026) x 0.31 (measured PSA 9/10 curve (gpk_vintage, at $50)); its set: 418 sale-backed other cards, 118 sold as base PSA 9 in the last 180 days, less the measured never-sold discount (21%) ($13); from its own raw (ungraded) sales ($3, 33 sales, newest Sep 2026) x 7.73 (measured raw -> PSA curve)).
$17
PSA 9 · estimate · last sold Apr 1, 2020
PSA 10 comp $51
no PSA 9 listed on eBay right now
RAW (UNGRADED) — NOT A GRADED VALUE
$2
17 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 Thin To Call
Straight from the Garbologist's clipboard:
  • Only 2 recorded sales on the books — not enough for a trend without kidding ourselves. The last one changed hands at $10 on 2020-04-01.
  • 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.

Stair Casey — across every card

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

🧬 Should I slab it?

SAVE YOUR MONEY

Only a 62.1% 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 ~$37 before the $80 PSA fee (fee only - excludes shipping & insurance), ~-$43 after - near or below a raw copy ($2 from 17 raw sales). Not worth grading unless you are confident it is a 10.

Gem (PSA 10) rate
62.1%
this card · 29 graded
PSA 10 value
$51
if you hit the ten
Grading cost
$80
PSA Regular tier
Expected after grade
-$43
vs raw $2 from 17 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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