Rocket's Secret Experiment Gym Challenge #120
Sold prices, not asking · Updated 5 July 2026
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Rocket's Secret Experiment is a Uncommon Pokémon card from Gym Challenge (#120), illustrated by Ken Sugimori. It's a Trainer card. Its current blended market value is $9.66 ungraded, with a PSA 10 worth around $92 — a gem-mint grading premium of roughly 9× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.
Prices last updated 5 July 2026.
| Grade | Relative value | Price |
|---|---|---|
| PSA 10pop 25 | $92$83–$300 | |
| PSA 9pop 60 | $47$26–$70 | |
| PSA 8pop 39 | $9$9–$13 | |
| PSA 7pop 8 | $6$6–$6 |
Price history · Raw
Recent sold prices
Real completed sale prices from Fanatics Collect — weekly and premier auctions plus marketplace Buy It Now sales, refreshed periodically. Grade read from the listing title.
Population across graders
Only 18% of 139 PSA-graded Rocket's Secret Experiment copies are a gem-mint 10 (25 of 139) — the rest grade lower.
Full grade breakdown (7 grades)
Full grade breakdown (5 grades)
Should you grade it?
Only 18% of copies gem (PSA 10 best case +$11); most land at PSA 9 or below.
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $91.65 | $70.91 | +$11 | 9.5× |
| PSA 9 | $47.21 | $70.46 | −$33 | 4.9× |
| PSA 8 | $9.02 | $70.08 | −$71 | 0.9× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 139 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 18% | $92.00 |
| PSA 9 | 43.2% | $47.00 |
| PSA ≤8 | 38.8% | $10.00 |
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.
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Where to buy
Market dataCross-market spread, EU price, momentum & community buzz
Cross-market prices
38% spreadCurrently 38% cheaper on PriceCharting 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.
Card text
Flip a coin. If heads, search your deck for any card and put it into your hand. Shuffle your deck afterward. If tails, you can't play Trainer cards until the end of your next turn.
Card details
More from Gym Challenge
Frequently asked questions
How much is Rocket's Secret Experiment (Gym Challenge #120) worth?
As of 5 July 2026, Rocket's Secret Experiment from Gym Challenge is worth approximately $9.66 ungraded (near-mint), and around $92 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 Rocket's Secret Experiment?
A PSA 10 (gem mint) Rocket's Secret Experiment from Gym Challenge is worth around $92 — roughly 9× the raw ungraded value of $9.66.
Should I grade my Rocket's Secret Experiment?
A PSA 10 sells for about $92 versus $9.66 raw — roughly a 9× 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 Rocket's Secret Experiment rare?
Rocket's Secret Experiment is a Uncommon card from Gym Challenge (card #120), illustrated by Ken Sugimori. Its current blended market value is $9.66 ungraded.