Front
1987 Topps Garbage Pail Kids Original Series 8 #306b Leftover Grover front
Back
Price history · PSA 10
— Hold· thin volume
PSA pop · this parallel
17
Card # 306B
Garbage Pail Kids
TCA Value iTCAxis 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.
$84
PSA 10 · highest-graded comp
Confidence
★★★☆☆
8 comp sales
See Active PSA 10 See Sold PSA 10 View on PSA
Value range RECENT SALES
$46.01 $83.82 $144.70
real comps est. — own older sales est. — never sold unsold
Last Sale
$83.82
2026-06-05 · PSA 10
Avg Sale (30d)
across 0 sales
Volume (30d)
0 sales
-100% SALES COUNT vs prior 30d
Comp Sales (All)
8
all grades
vs 1 mo
vs 2 mo
vs 3 mo
High Low Avg sales Subject trend
Parallels — 2 for this card
Base
$84
pop 17 @ PSA 10
Base pop 42
PSA 10 $84 pop 17
PSA 9 $41 pop 18
PSA 8 $19 pop 4
PSA 7 $10 EST. pop —
PSA 6 $6 pop 1
PSA 5 $8 pop 2
PSA 4 $7 EST. pop —
PSA 3 $6 EST. pop —
PSA 2 $5 EST. pop —
PSA 1 $5 EST. pop —
Green Slime
$57 EST.
pop — @ PSA 10
Green Slime pop 1
PSA 10 $57 EST. pop —
PSA 9 $40 EST. pop —
PSA 8 $28 EST. pop —
PSA 7 $20 EST. pop —
PSA 6 $14 EST. pop —
PSA 5 $10 EST. pop —
PSA 4 $7 EST. pop —
PSA 3 $5 EST. pop —
PSA 2 $3 EST. pop —
PSA 1 $2 EST. pop —

🗑️ The Garbologist says…

Trending Up
Straight from the Garbologist's clipboard:
  • 8 recorded sales · 2 in the last year · trades only a few times a year · moderate-confidence sample.
  • Following the trash: $45 → $338 → $300 → $35 → $84 — a clear march higher.
  • Median moved +352% across the window ($42 → $192).
  • Census check: PSA has graded 42 of this card, and only 40.5% come back a 10 — gems fairly readily.
  • 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.

🧬 Should I slab it?

Worth grading

About a 40% 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 ~$54 before the $19 PSA fee (fee only - excludes shipping & insurance), ~$35 after, vs a raw copy around $2 (est.). Grading pencils out here, especially if you hit the $84 ten.

Gem (PSA 10) rate
40%
this card · 42 graded
PSA 10 value
$84
if you hit the ten
Grading cost
$19
PSA Value tier
Expected after grade
$35
vs raw ~$2 est.

Probability-weighted across grades using PSA population as a proxy for this set’s 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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