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NOT WORTH ITBased on 0 graded sales and 1,305,862 pop-report entries for a near-mint copy.
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✨ Is it worth it?
An AI market read of this card — value, momentum, grading economics, liquidity. It lays out the data; you decide.
Gastrodon is a Rare Pokémon card from Steam Siege (#29), illustrated by Aya Kusube. It's a Stage 1 Water-type Pokémon with 110 HP, evolving from Shellos, weak to Grass ×2. Its current blended market value is $0.54 ungraded, with a PSA 10 worth around $36 — a gem-mint grading premium of roughly 66× 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
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Recent sold prices
No recent sold listings tracked.
Should you grade it?
Expected return across every likely grade, after fees — the realistic average, not the best case. Only 0% of copies gem (PSA 10 best case −$35); most land at PSA 9 or below.
The odds
Gastrodon is a Rare in Steam Siege — the pack's hit slot lands on Rare 59.7% of the time, split across 30 rare cards in the set, so pulling this exact card is roughly 1 in 50 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 | $35.68 | $70 | −$35 | 66.1× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 24 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 0% | $36.00 |
| PSA 9 | 25% | $14.00 |
| PSA ≤8 | 75% | $1.00 |
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 0% of 1 PSA-graded Gastrodon copies are a gem-mint 10 (0 of 1) — the rest grade lower.
Real graded population from PSA, CGC & BGS — a lower gem rate means a Gastrodon 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 10 | $36$36–$36 |
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
143% spreadCurrently 143% cheaper on Cardmarket 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.
🇪🇺 Cardmarket price · Europe
35% cheaper than the USCard textAttacks, abilities, weakness / resistance / retreat
Evolves from Shellos.
During your opponent's next turn, the Defending Pokémon's attacks cost Colorless more, and its Retreat Cost is Colorless more.
Your opponent's Active Pokémon is now Asleep.
“It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.”
About the PokémonSpecies, generation, evolution line
Card detailsSet, rarity, artist, Pokédex & specs
Other Gastrodon cards
There are 4 different Gastrodon printings — make sure you're valuing the right one. This is Steam Siege #29 (Rare).
More from Steam Siege
Frequently asked questions
How much is Gastrodon (Steam Siege #29) worth?
As of 20 August 2026, Gastrodon from Steam Siege is worth approximately $0.54 ungraded (near-mint), and around $36 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 Gastrodon?
A PSA 10 (gem mint) Gastrodon from Steam Siege is worth around $36 — roughly 66× the raw ungraded value of $0.54.
Should I grade my Gastrodon?
A PSA 10 sells for about $36 versus $0.54 raw — roughly a 66× 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 Gastrodon rare?
Gastrodon is a Rare card from Steam Siege (card #29), illustrated by Aya Kusube. Its current blended market value is $0.54 ungraded.
Cite & embed this card
Free to use with attribution to CardTrack.
Gastrodon (Steam Siege #29) — Pokémon market value $0.54, PSA 10 $35.68. Source: CardTrack, https://cardtrack.com/pokemon/card/steam-siege/gastrodon-29<iframe src="https://cardtrack.com/embed/card?id=xy11-29" width="100%" height="160" style="border:0;max-width:460px" title="Gastrodon price — CardTrack" loading="lazy"></iframe>
<p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>