Rocket's Secret Experiment

Gym Challenge · #120/132 · Uncommon · 2000

$9.66

1st Edition · Market price ▲ 0.0% (30d)

Prices as of Jul 26, 2026

Unlimited 1st Edition

Art · Ken Sugimori

261graded pop

15%gem rate

4.1×PSA 10 vs raw

-31%off ATH $6.99 · Jul 2026

−$11.76EV to grade — don't

Printings & price history

1st Edition▲ 0.0% 7d$9.66

Low $9.35

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Graded values

updated 2026-07-26

Grade 6 est.$5.84

Grade 5 est.$4.92

Grade 4 est.$4.06

Grade 3 est.$3.38

Grade 2 est.$2.77

Grade 1 est.$2.34

Grades 1–6 are estimates modeled from the raw price — PSA/CGC/BGS 7–10 and Ungraded are live tracked market values.

1st Edition · PSA 10 price history$105.64

PSA 10 chart is building — graded values are tracked nightly, a new point appears each day.

Graded population census · updated 2026-07-08

1st Edition

PSA137 graded · 25 gem 10

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CGC74 graded · 6 gem 10

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Population data from PriceCharting, updated monthly.

How much is Rocket's Secret Experiment #120/132 worth?

Rocket's Secret Experiment #120/132 is a Uncommon card from Gym Challenge (2000) — today it trades at roughly $4.22 ungraded. Across the 2 printings we track, copies run anywhere from $2.40 to $96.95 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $39.99, roughly 9.5x the raw price, while a PSA 9 sits near $19.99. 137 copies have been graded to date, and 18% of them came back a 10 — worth knowing before you pay grading fees.

We update this valuation every night from live market data and verify it against real completed sales — see the chart above for how Rocket's Secret Experiment has moved over time.