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Rocket's Secret Experiment
Gym Challenge · #120
$4.14latest TCGplayer median
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Price history (TCGplayer median, ~180 days)
About Rocket's Secret Experiment #120's market value
Rocket's Secret Experiment #120 (Unlimited, Uncommon) from Gym Challenge (2000) has a market price of $4.14 raw as of August 30, 2026, the TCGplayer market price for this exact printing. For context, the median Gym Challenge card is $6.00; this one ranks #159 of 263 priced printings. Over the last 30 days the price has held steady (−1.9%). Its 180-day range is $3.68 to $4.65.
Graded copies of Rocket's Secret Experiment sell for more than raw. PSA 9 copies go for around $70.00, about 3.1× the raw price (4 recent sales) — thin data, treat as indicative. Other grades we track: CGC 8.5 at $29.99, PSA 6 at $14.00, CGC 10 at $11.50. Graded medians come from recent eBay sold listings and refresh daily.
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