Pokémon sets › Gym Challenge › Rocket's Secret Experiment
Rocket's Secret Experiment #120
Medium confidence 64th most valuable of 133 priced cards in Gym Challenge
Solid guide price from market data — pre-2010 condition spread, liquid, well-sampled card.
Priced against the UK market and refreshed weekly — adjusted where UK collectors reliably pay above the US average. We have not yet seen enough recent UK activity for this card to read it directly.
A PSA 10 of this card sells for about 8.3× the ungraded price — £3.56 raw against £29.51 graded.
Peaked at £5.56 in July 2026; lowest £3.15 in June 2026. PSA 10 moved -0.4% over a comparable period.
UK price month by month
| Month | UK ungraded |
|---|---|
| May 2026 | £3.77 |
| June 2026 | £4.54 |
| July 2026 | £5.56 |
| August 2026 | £3.56 |
UK guide prices, with the US market alongside — updated 30 August 2026. Each market is priced from real market data in that market. Estimates for collection tracking — not an appraisal or a quote.
Check recent UK sold prices on eBay →
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