Chesnaught #XY68, Breakthrough Prerelease, XY Black Star Promos
- Card number: #XY68
- Rarity: Promo
- Finish: Holo
A PSA 9 Chesnaught #XY68 Breakthrough Prerelease from XY Black Star Promos has a TCGBerg fair value of $87 as of Nov 15, 2026. It rests on 6 recorded sales, the latest on May 24, 2026. PSA has graded 23 copies at PSA 9. Sales evidence is sparse, so treat this value as a rough estimate.
TCGBerg Algorithm (estimated from recorded sales).
6 sales · latest May 24, 2026
- Population · PSA 9
- 23
- Market cap
- $2.0K
- Volatility
- 23.5%
- YTD
- ↑ 221.1%
- Sales evidence
- Sparse
TCGBerg fair value · PSA 9
$87
Based on 6 recorded sales. Latest sale: May 24, 2026.
Price history
Weekly fair value for PSA 9. Shaded area is the confidence band: how precisely we can pin the value; it tightens as more sales confirm it. Dots are individual sales.
What the evidence says
The latest recorded PSA 9 sale ($149 on Oct 16, 2026) sits 70.9% above the $87 fair value, too far off to read as this grade's price. The value rests on 6 recorded PSA 9 sales. The latest sale ran above the recent run: the last 2 PSA 9 sales averaged $66, within 24.5% of the value. Its confidence band runs from $71 to $103. A PSA 10 ($949) is worth 10.9 times a PSA 9 ($87). With sparse sales evidence, read the gap and the band as rough guides.
TCGBerg fair value by grade
Value at each grade and ungraded condition. Log scale. Tap a row to switch the whole page.
Behind the scenes
What goes into this price, and how much we know.
Recent sales
2 trackedEach sale against the grade's fair value on the day it sold.
- $149Oct 16, 2026 · via eBayabove fair value by 270.8%
- $21May 24, 2026 · via eBaybelow fair value by 20.7%
All grades matrix
Every grade we track for this printing. Click any column header to sort; the rightmost column jumps you to listings for that grade.
- $9491d 0.0%7d 0.0%30d 408.9%
- Pop
- 1
- Mcap
- $949
- Evidence
- Sparse
- Last
- -
- $871d 1.7%7d 1.8%30d 113.4%
- Pop
- 23
- Mcap
- $2.0K
- Evidence
- Sparse
- Last
- $149
- $471d 0.0%7d 0.0%30d 51.2%
- Pop
- 13
- Mcap
- $611
- Evidence
- Sparse
- Last
- $13
| $949 | 1 | $949 | 0.0% | 0.0% | up 408.9% | up 550.9% | Sparse | - | |
| $87 | 23 | $2.0K | up 1.7% | up 1.8% | up 113.4% | up 173.0% | Sparse | $1491mo ago | |
| $47 | 13 | $611 | 0.0% | 0.0% | up 51.2% | up 91.3% | Sparse | $131y ago | |
| $47 | 9 | $423 | 0.0% | 0.0% | up 51.2% | up 91.3% | Sparse | $302y ago | |
| $47 | 4 | $188 | 0.0% | 0.0% | up 51.2% | up 91.3% | Sparse | - |
PSA population report
50 graded copies of Chesnaught Breakthrough Prerelease across 5 grades. The selected grade is highlighted.
PSA 9 makes up 46% of graded copies: 23 of 50. It’s the most common grade for this card.
Analysis
Chesnaught-Holo Breakthrough Prerelease - Breakthrough Prerelease at PSA 10 carries a TCGBerg fair value of $949 as of 2026-11-14. We track a TCGBerg fair value across 5 grades from XY Black Star Promos, from PSA 8 up to PSA 10. A graded population of 1 copies sits behind the PSA 10 grade. The PSA 10 valuation rests on sparse sales evidence. Over the past 30 days, the PSA 10 TCGBerg fair value has risen 408.9%.