![Brock's Golem [1st Edition] #20](https://tcgplayer-cdn.tcgplayer.com/product/83967_200w.jpg)
Brock's Golem [1st Edition] #20
Pokemon Gym Heroes · #20 · 2000
STRONG BUY
Fundamentals171% Undervalued
OvervaluedFair ValueUndervalued
Momentum+99% Expected
DecliningFlatAppreciating
Our model estimates fair value at $68, suggesting this card is 171% undervalued at $25. Momentum is strong — the temporal model projects +99% over the next 12 months. Only 26 PSA 10s exist out of 200 graded (17.5% gem rate), making gem copies exceptionally scarce.
Value Thesis
Market Price$25
Fair Value$68(+171%)
12-Mo Price Target$50(+100%)
MomentumTrending Up
Gem Thesis
PSA 10 Price$110
Implied Grade 10 FV$168(+53%)
Grading Premium4.4x raw price
Gem Rate17.5%(200 graded)
Grade 10/9 Spread3.4x(9 at $32)
Price History
Price History
Fair Value Breakdown
| Base (avg card) | $3 |
| Character | +$25 |
| Rarity | +$18 |
| Other | +$16 |
| Set | +$5 |
| Artwork | +$2 |
| Nostalgia | $-1 |
| Fair Value | $68 |
Grading Population
PSA
1
1
2
0
3
1
4
0
5
2
6
7
7
13
8
30
9
45
10
26
Total Graded: 125Gem Rate: 20.8%
CGC
1
0
2
0
3
1
4
3
5
2
6
10
7
10
8
18
9
22
10
9
Total Graded: 75Gem Rate: 12.0%
Grade Prices
| Grade | Price | Premium |
|---|---|---|
| Grade 3 | $3 | 0.2x |
| Grade 2 | $3 | 0.2x |
| Grade 4 | $4 | 0.3x |
| Grade 5 | $5 | 0.4x |
| Grade 6 | $6 | 0.5x |
| Grade 7 | $8 | 0.6x |
| Grade 8 | $10 | 0.7x |
| Ungraded | $13 | 1.0x |
| Grade 7 | $19 | 1.5x |
| Ungraded | $22 | 1.0x |
| CGC 10 | $23 | 1.8x |
| Grade 9 | $32avg last 3 | 2.5x |
| Grade 9.5 | $31 | 2.4x |
| Grade 8 | $40 | 3.1x |
| CGC 10 Pristine | $42 | 3.3x |
| Grade 9 | $32avg last 3 | 2.5x |
| Grade 9.5 | $48 | 3.7x |
| SGC 10 | $54 | 4.2x |
| PSA 10 | $110avg last 3 | 8.6x |
| PSA 10 | $110avg last 3 | 8.6x |
| BGS 10 | $117 | 9.1x |
| BGS 10 Black | $585 | 45.6x |
Prices from PriceCharting estimates. Verify on eBay for live market data.
Data sourced from PriceCharting and TCGPlayer. Fair value computed via LOGO-CV machine learning model. Ratings updated monthly. View on PriceCharting