Brock's Training Method
City Gym Decks · #promo · None · 1998JPN
Printings & price history
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Graded values
Grades 1–6 are estimates modeled from the raw price — PSA/CGC/BGS 7–10 and Ungraded are live tracked market values.
Ungraded chart is building — graded values are tracked nightly, a new point appears each day.
Graded population census · updated 2026-09-18
Population data from PriceCharting, updated monthly.
How much is Brock's Training Method #promo worth?
Right now (October 18, 2026) the going rate for an ungraded Brock's Training Method #promo from City Gym Decks is about $2.89. Across the 2 printings we track, copies run anywhere from $1.25 to $4.95 depending on the version you're holding.
Grading changes the math on this one: a PSA 10 is valued around $180.00, roughly 62.3x the raw price, while a PSA 9 sits near $20.50. 44 copies have been graded to date, and 25% of them came back a 10 — worth knowing before you pay grading fees.
These figures come from nightly market-data syncs verified against completed sales. Use the chart above to see the trend before you buy or sell.
