Gastrodon Steam Siege #29
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 $0.80 ungraded, with a PSA 10 worth around $35 — a gem-mint grading premium of roughly 44× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.
Prices last updated 2 July 2026.
Price by variant
TCGplayer market price per printing — reverse holo, 1st edition and unlimited often differ sharply.
| Grade | Relative value | Price |
|---|---|---|
| PSA 10 | $35$35–$35 |
Price history · raw near-mint
Recent sold prices
No recent sold listings tracked.
Population across graders
Should you grade it?
after ~$70.34 grading fee → 43.8× the raw value
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $35.00 | $70.34 | −$36 | 43.8× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 11 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 36.4% | $35.00 |
| PSA 9 | 36.4% | $14.00 |
| PSA ≤8 | 27.3% | $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.
We'll email you when this card's value crosses your target.
Where to buy
Market signal
Derived from this card's 90-day price history, recent trend and cross-market price gap. Informational, not advice.
🇪🇺 Cardmarket price · Europe
57% cheaper than the USCard text
Evolves from Shellos.
“It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.”
About the Pokémon
It has a pliable body without any bones. If any part of its body is torn off, it grows right back.
Card details
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 2 July 2026, Gastrodon from Steam Siege is worth approximately $0.80 ungraded (near-mint), and around $35 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 $35 — roughly 44× the raw ungraded value of $0.80.
Should I grade my Gastrodon?
A PSA 10 sells for about $35 versus $0.80 raw — roughly a 44× 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 $0.80 ungraded.