What's your copy worth?
What this price is based on
Medium confidence29 sales in 90 days, but prices vary widely.
What each version actually sells for
Every figure is the median of real completed sales whose listing claimed that printing and condition — not a percentage of the headline price. A dash means we haven't seen enough sales of that exact version to publish one.
Recent Raw sales
- Aug 14, 2026eBay — Pokemon Card - Cloyster Expedition Base Set 42/165 Rare$18.99
- Aug 7, 2026eBay — Pokemon Card - Cloyster Expedition Base Set 42/165 Rare (Non Holo)$18.00
- Aug 2, 2026eBay — Cloyster (42) Expedition #042 (2002) Rare LP PokemonLP$14.99
- Jul 31, 2026eBay — Pokemon Card - Cloyster Expedition Base Set 42/165 Rare$19.99
- Jul 27, 2026eBay — Cloyster 42/165 Expedition Rare Stage 80HP E-Reader 2002 Pokémon TCG$19.99
- Jul 26, 2026eBay — Pokemon Card - Cloyster Expedition Base Set 42/165 Rare$19.99
- Jul 23, 2026eBay — Cloyster | 42/165 | Expedition Base Set | Rare | LPLP$12.00
- Jul 23, 2026eBay — Pokemon Card - Cloyster Expedition Base Set 42/165 Rare MPMP$6.50
By grade
- Raw$14.9933 sales
- CGC 10$80.404 sales
- PSA 9$35.003 sales
- PSA 7$59.993 sales
- CGC 9$28.803 sales
- CGC 8$29.802 sales
- PSA 8$34.001 sale
- PSA 10$2331 sale
From 53 completed sales recorded between Jan 13, 2025 and Aug 15, 2026. Sold prices only — asking prices are never counted.
Grade it or not
NOT WORTH ITBased on 20 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.
Cloyster is a Rare Pokémon card from Expedition Base Set (#42), illustrated by Kyoko Umemoto. It's a Stage 1 Water-type Pokémon with 80 HP, evolving from Shellder, weak to Metal ×2. Its current blended market value is $16.62 ungraded, with a PSA 10 worth around $82 — a gem-mint grading premium of roughly 5× 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 history8 in 90 days✓ real completed listings
Real completed eBay sales, refreshed periodically. Grade read from the listing title. Implausibly priced listings (lots, proxies, empty slabs) and wrong-variant sales are filtered out. Links to eBay are affiliate links — we may earn a commission.
Demand & liquidity
Last sold $20 · Raw · 24 Jun 2026
Should you grade it?
Expected return across every likely grade, after fees — the realistic average, not the best case. Only 38.9% of copies gem (PSA 10 best case −$6); most land at PSA 9 or below.
The odds
Cloyster is a Rare in Expedition Base Set — the pack's hit slot lands on Rare 67% of the time, split across 40 rare cards in the set, so pulling this exact card is roughly 1 in 60 packs.
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 | $81.88 | $71 | −$6 | 4.9× |
| PSA 9 | $49.95 | $70 | −$37 | 3.0× |
| PSA 8 | $18.00 | $70 | −$69 | 1.1× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 149 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 38.9% | $82.00 |
| PSA 9 | 36.9% | $50.00 |
| PSA ≤8 | 24.2% | $17.00 |
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 39% of 149 PSA-graded Cloyster copies are a gem-mint 10 (58 of 149) — the rest grade lower.
Real graded population from PSA, CGC & BGS — a lower gem rate means a Cloyster 10 is harder to pull.
Copies for sale right now
Affiliate links — we may earn a commission. Prices shown are sold-based, not sponsored placements.
All grades & conditions
Every grade we pricePSA / CGC / BGS ladder with per-grade population
| Grade | Relative value | Price |
|---|---|---|
| PSA 10pop 58 | $82$70–$94 | |
| PSA 9pop 55 | $50$42–$57 | |
| PSA 8pop 21 | $18$15–$21 | |
| PSA 7pop 9 | $13$11–$15 |
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
13% spreadCurrently 13% cheaper on TCGplayer than PriceCharting. 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.
Card textAttacks, abilities, weakness / resistance / retreat
Evolves from Shellder.
Flip a coin. If heads, the Defending Pokémon is now Paralyzed.
Flip 4 coins. This attack does 20 damage times the number of heads.
About the PokémonSpecies, generation, evolution line
Card detailsSet, rarity, artist, Pokédex & specs
Other Cloyster cards
There are 9 different Cloyster printings — make sure you're valuing the right one. This is Expedition Base Set #42 (Rare).
More from Expedition Base Set
Frequently asked questions
How much is Cloyster (Expedition Base Set #42) worth?
As of 20 August 2026, Cloyster from Expedition Base Set is worth approximately $16.62 ungraded (near-mint), and around $82 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 Cloyster?
A PSA 10 (gem mint) Cloyster from Expedition Base Set is worth around $82 — roughly 5× the raw ungraded value of $16.62.
Should I grade my Cloyster?
A PSA 10 sells for about $82 versus $16.62 raw — roughly a 5× 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 Cloyster rare?
Cloyster is a Rare card from Expedition Base Set (card #42), illustrated by Kyoko Umemoto. Its current blended market value is $16.62 ungraded.
Cite & embed this card
Free to use with attribution to CardTrack.
Cloyster (Expedition Base Set #42) — Pokémon market value $16.62, PSA 10 $81.88. Source: CardTrack, https://cardtrack.com/pokemon/card/expedition-base-set/cloyster-42<iframe src="https://cardtrack.com/embed/card?id=ecard1-42" width="100%" height="160" style="border:0;max-width:460px" title="Cloyster price — CardTrack" loading="lazy"></iframe>
<p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>