What's your copy worth?
What this price is based on
Low confidenceOnly 1 sale in the last 90 days.
Recent CGC 9.5 sales
By grade
- CGC 9.5$13.202 sales
- CGC 9$13.202 sales
- CGC 9.6$25.001 sale
- CGC 8.5$9.601 sale
- CGC 10$36.001 sale
From 7 completed sales recorded between Feb 23, 2026 and Jun 1, 2026. Sold prices only — asking prices are never counted.
Grade it or not
NOT WORTH ITBased on 7 graded sales and 1,889,841 pop-report entries for a near-mint copy.
See the numbers — Trader plan and aboveBuy this card
✨ Is it worth it?
An AI market read of this card — value, momentum, grading economics, liquidity. It lays out the data; you decide.
Koga's Grimer is a Common Pokémon card from Gym Challenge (#78), illustrated by Ken Sugimori. It's a Basic Grass-type Pokémon with 50 HP, weak to Psychic ×2. Its current blended market value is $2.80 ungraded, with a PSA 10 worth around $60 — a gem-mint grading premium of roughly 21× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.
Prices last updated 20 August 2026.
The receipts
Price history · Raw
We'll email you when this card's value crosses your target.
Verified sales history10 in 90 days✓ real completed listings
| Date | Grade | Price | Cert |
|---|---|---|---|
| 31 Jul 2026 | PSA 8 | $14.40 | #152297077 ✓ |
| 23 Jul 2026 | PSA 10 | $56.98 | #63451317 ✓ |
| 18 Jul 2026 | PSA 9 | $19.00 | #161681146 ✓ |
| 2 Jul 2026 | PSA 10 | $121.50 | #55932478 ✓ |
| 14 Dec 2025 | PSA 10 | $48.00 | #75761799 ✓ |
| 2 Nov 2025 | PSA 10 | $60.00 | #125536863 ✓ |
| 30 Sep 2025 | PSA 10 | $62.99 | #75761798 ✓ |
| 26 Aug 2025 | PSA 8 | $16.30 | #114773259 ✓ |
| 26 Apr 2025 | PSA 10 | $35.00 | #55932478 ✓ |
| 19 Jan 2025 | PSA 9 | $15.99 | #72552601 ✓ |
Should you grade it?
Expected return across every likely grade, after fees — the realistic average, not the best case. Only 33.3% of copies gem (PSA 10 best case −$13); most land at PSA 9 or below.
The odds
Koga's Grimer is a Commoncard — a guaranteed slot in every pack, not a rarity gamble, so there's no pull-odds figure for it.
Estimates only. Pack odds come from CardTrack's pack model (the same one behind the pack simulator) — not an official rate. Grading odds are the real cumulative PSA population, which skews toward nicer, resubmitted copies, so it overstates the true first-submission gem rate. Full grade-by-grade breakdown below.
Grade-by-grade ROI & risk-adjusted outcomesNet vs raw per target grade, plus the probability-weighted distribution
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $60.00 | $71 | −$13 | 21.4× |
| PSA 9 | $14.23 | $70 | −$59 | 5.1× |
| PSA 8 | $12.44 | $70 | −$60 | 4.4× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 60 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 33.3% | $60.00 |
| PSA 9 | 35% | $14.00 |
| PSA ≤8 | 31.7% | $3.00 |
Net = graded value − raw value − grading cost (tier fee + ~$20 round-trip shipping), using PSA fees as of 2026-06-28; the paused PSA Value tier is excluded so this isn't overstated. Gem rate is estimated from cumulative PSA population, which skews toward nicer, resubmitted copies — so it overstates the true grade rate. Treat it as a guide, not a guarantee.
Population across gradersPSA, CGC & BGS — every grade, with gem rates
Only 33% of 60 PSA-graded Koga's Grimer copies are a gem-mint 10 (20 of 60) — the rest grade lower.
Real graded population from PSA, CGC & BGS — a lower gem rate means a Koga's Grimer 10 is harder to pull.
Copies for sale right now
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All grades & conditions
Every grade we pricePSA / CGC / BGS ladder with per-grade population
| Grade | Relative value | Price |
|---|---|---|
| PSA 10pop 20 | $60$51–$69 | |
| PSA 9pop 21 | $14$12–$16 | |
| PSA 8pop 9 | $12$11–$14 | |
| PSA 7pop 4 | $4$4–$5 |
Raw condition ladderNM → damaged, with real sold medians where we have them
Price by printingBase vs reverse holo vs 1st edition — priced separately
Price by variant
TCGplayer market price per printing — reverse holo, 1st edition and unlimited often differ sharply.
Market dataCross-market spread, EU price, momentum & community buzz
Cross-market prices
128% spreadCurrently 128% cheaper on Cardmarket than TCGplayer. These are independent market prices for the same card — a wide gap can mean a buying opportunity. Informational only, not arbitrage advice.
Market signal
Derived from this card's 90-day price history, recent trend and cross-market price gap. Informational, not advice.
🇪🇺 Cardmarket price · Europe
56% cheaper than the USCard textAttacks, abilities, weakness / resistance / retreat
If your opponent has any Benched Pokémon, flip a coin. If heads, choose 1 of your opponent's Benched Pokémon and switch it with the Defending Pokémon. The new Defending Pokémon is now Poisoned.
Card detailsSet, rarity, artist, Pokédex & specs
More from Gym Challenge
Frequently asked questions
How much is Koga's Grimer (Gym Challenge #78) worth?
As of 20 August 2026, Koga's Grimer from Gym Challenge is worth approximately $2.80 ungraded (near-mint), and around $60 in PSA 10 gem mint. Values are blended from real Cardmarket, eBay sold and TCGplayer prices and update daily.
What is the PSA 10 price for Koga's Grimer?
A PSA 10 (gem mint) Koga's Grimer from Gym Challenge is worth around $60 — roughly 21× the raw ungraded value of $2.80.
Should I grade my Koga's Grimer?
A PSA 10 sells for about $60 versus $2.80 raw — roughly a 21× uplift. Grading is worth it when that premium comfortably beats the grading fee and the card is clean enough to have a real shot at a 10. See the "Should you grade it?" estimate above for net profit per grade.
Is Koga's Grimer rare?
Koga's Grimer is a Common card from Gym Challenge (card #78), illustrated by Ken Sugimori. Its current blended market value is $2.80 ungraded.
Cite & embed this card
Free to use with attribution to CardTrack.
Koga's Grimer (Gym Challenge #78) — Pokémon market value $2.80, PSA 10 $60.00. Source: CardTrack, https://cardtrack.com/pokemon/card/gym-challenge/koga-s-grimer-78<iframe src="https://cardtrack.com/embed/card?id=gym2-78" width="100%" height="160" style="border:0;max-width:460px" title="Koga's Grimer price — CardTrack" loading="lazy"></iframe>
<p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>