Kingdra-GX SM Black Star Promos #SM155
Kingdra-GX is a Promo Pokémon card from SM Black Star Promos (#SM155), illustrated by 5ban Graphics. It's a Stage 2 GX Water-type Pokémon with 230 HP, evolving from Seadra, weak to Grass ×2. Its current blended market value is $15.51 ungraded, with a PSA 10 worth around $149 — a gem-mint grading premium of roughly 10× 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.
| Grade | Relative value | Price |
|---|---|---|
| PSA 10 | 10 sold$149$126–$171 | |
| PSA 9 | 6 sold$37$32–$43 | |
| PSA 8 | $13$13–$13 |
Price history · raw near-mint
Recent sold prices
Real completed hammer prices from Fanatics Collect weekly and premier auctions, refreshed periodically. Grade read from the listing title.
Population across graders
Should you grade it?
after ~$71.48 grading fee → 9.6× the raw value
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $148.80 | $71.48 | +$62 | 9.6× |
| PSA 9 | $37.29 | $70.36 | −$49 | 2.4× |
| PSA 8 | $13.00 | $70.12 | −$73 | 0.8× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 691 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 52.8% | $149.00 |
| PSA 9 | 34.9% | $37.00 |
| PSA ≤8 | 12.3% | $16.00 |
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
Cross-market prices
94% spreadCurrently 94% 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
48% cheaper than the USCard text
Evolves from Seadra.
Pokémon-GX rule: When your Pokémon-GX is Knocked Out, your opponent takes 2 Prize cards.
Card details
Other Kingdra-GX cards
There are 3 different Kingdra-GX printings — make sure you're valuing the right one. This is SM Black Star Promos #SM155 (Promo).
More from SM Black Star Promos
Frequently asked questions
How much is Kingdra-GX (SM Black Star Promos #SM155) worth?
As of 2 July 2026, Kingdra-GX from SM Black Star Promos is worth approximately $15.51 ungraded (near-mint), and around $149 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 Kingdra-GX?
A PSA 10 (gem mint) Kingdra-GX from SM Black Star Promos is worth around $149 — roughly 10× the raw ungraded value of $15.51.
Should I grade my Kingdra-GX?
A PSA 10 sells for about $149 versus $15.51 raw — roughly a 10× 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 Kingdra-GX rare?
Kingdra-GX is a Promo card from SM Black Star Promos (card #SM155), illustrated by 5ban Graphics. Its current blended market value is $15.51 ungraded.