Brock's Onix
Gym Heroes · Gym
- Number
- #21 / 132
- Supertype
- Pokemon
- Subtypes
- Basic
- HP
- 70
- Types
- Fighting
- Rarity
- Rare Holo
- Artist
- Benimaru Itoh
Market Price
Last Sale
$13.76
as of ~Aug 2026
Lowest Ask
$9.13
Price History
Market Price↑ +8.2% (3M)
Market Signal
Price Trend
↑ +4.4% (30d trend)
high confidence90d Range
$12.56$14.02
18% below 90d high
Volatility
low0.5%
Signal uses price history only. Grading ROI, graded-market trend, and population scarcity activate when graded data is available.
◉ Buy · 1 of 4 factors available
Grading ROI Calculator
Enter your estimated sale price for each grade.
Sale price by grade (edit to override)
Grade 10
Grade 9
Grade 8
Grade 7
Grade 6
Grading company
Sell platform
| Grade | Sale Price | Grading Fee | Platform Fees | Net Profit | ROI% |
|---|---|---|---|---|---|
| 10 | $13.76 | $49.99 | $2.22 | -$38.45 | -76.9% |
| 9 | $5.50 | $49.99 | $1.13 | -$45.62 | -91.3% |
| 8 | $2.75 | $49.99 | $0.76 | -$48.00 | -96.0% |
| 7 | $1.65 | $49.99 | $0.62 | -$48.96 | -97.9% |
| 6 | $1.10 | $49.99 | $0.55 | -$49.44 | -98.9% |
Tax estimated at 28% max (long-term collectibles, IRC §1(h)(4)). Tax column hidden: enter a cost basis to see estimates. Platform fees generally reduce take-home but not your IRS capital gain.
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