Brock's Onix #021 Gym Heroes 1st Edition Price

Brock's Onix #021 price, trend & prediction

Brock's Onix #021 (1st Edition, Rare) from Gym Heroes (2000) has a market price of $17.13 raw as of October 11, 2026, the TCGplayer market price for this exact printing. It sits well above the set's median card ($5.65), ranking #66 of 264 priced printings. Over the last 30 days the price has edged up (+5.7%), +30.3% over 90 days. Its 180-day range is $12.88 to $17.13 — it is trading near the top of that range.

Graded copies of Brock's Onix sell for more than raw. A PSA 10 has a recent sale median of $496.93, about 29× the raw price (1 recent sale) — thin data, treat as indicative. PSA 9 copies go for around $24.99, about 1.5× the raw price (1 recent sale) — thin data, treat as indicative. Other grades we track: ACE 8 at $20.49, CGC 9 at $15.00, PSA 8 at $12.50. Graded medians come from recent eBay sold listings and refresh daily.

Brock's Onix #021 price prediction: if recent momentum continues, the 30-day trend for this card is upward. Momentum is pointing up: the price is higher across the windows we track (+5.7% over 30 days, +0.0% over 7 days, +30.3% over 90 days). This is a read of past price moves, not a model forecast and not investment advice — see the forecast methodology and public accuracy scoreboard for how our ML outlooks are built and scored.