Some trading card sets almost never produce a perfect grade. In our AI analysis, several popular sets had a 0% Gem Mint rate — meaning not a single card we checked from them was predicted to earn a perfect 10. If you are grading these blind, you are likely paying for grades you will not get. Here is the data.
Sets with the lowest Gem Mint rate
Based on AI pre-grading of trading cards on the standard 1-10 scale (sets with 15+ cards analyzed):
| Set | Cards analyzed | Reached Gem Mint 10 | Avg predicted grade |
|---|---|---|---|
| Base Set (vintage) | 24 | 0% | 6.7 |
| Topps Baseball | 52 | 0% | 6.0 |
| Perfect Order | 31 | 3.2% | 8.5 |
| Crown Zenith | 41 | 7.3% | 9.1 |
| Ascended Heroes | 55 | 7.3% | 8.7 |
| Topps (various) | 104 | 9.6% | 7.7 |
Vintage sets like Base Set top the "trap" list: decades of handling plus tighter centering tolerances mean almost no raw copy is a true 10. High-volume modern sports sets (Topps Baseball) also score low — print and centering issues are common.
The flip side: sets with the highest Gem Mint rate
| Set | Reached Gem Mint 10 |
|---|---|
| A Fist of Divine Speed | 66.7% |
| Panini Prizm Football | 40% |
| Pokémon 151 | 30.7% |
| Scarlet & Violet | 37.5% |
How to use this
- Vintage = pre-grade first, always. A 0% Gem Mint rate means even "clean-looking" copies usually cap at a 7-9.
- Don't assume modern = mint. Even hyped sets vary wildly in gem rate.
- Check before you submit. Run a free AI pre-grade to see your card's likely grade in seconds.
See the full dataset in our State of Pre-Grading 2026 report, and learn what drives a grade in our card condition guide.
Methodology
Based on AI pre-grading of a recent sample of cards by TCGAI.PRO. Grades are AI predictions on the 1-10 scale, not official grades. TCGAI.PRO is independent and not affiliated with any grading company. "Gem Mint" is an industry term used for clarity.