Mewtwo & Mew GX SM191/248 SM Black Star Promos Pregrading Report
Card photos and centering analysis
This is a PokeToGrade pregrading report for Mewtwo & Mew GX SM191/248 SM Black Star Promos. Based on centering and surface analysis, the estimated grade is approximately PSA 8. Raw copies are worth about $388.82, while a graded PSA 10 is around $3,390.42. That works out to an estimated grading ROI of about 0.8x. Use this analysis to decide whether to grade it or keep it raw.
Grade
Estimated pregrade: PSA 8. This is a pre-submission estimate from centering and surface condition.
Centering
- Front: 64/36 top-to-bottom, 47/53 left-to-right
- Back: 59/41 top-to-bottom, 48/52 left-to-right
Corner analysis
- Back corners: 99/100
Value: raw vs graded
| Raw / ungraded | $388.82 |
|---|---|
| PSA 9 | $579.98 |
| PSA 10 | $3,390.42 |
| BGS 10 | $4,408.00 |
| CGC 10 | $949.91 |
| Estimated grading ROI | 0.8x |
How PokeToGrade pregrading works
PokeToGrade is a pregrading tool for trading cards. Upload front and back photos and it measures centering, flags surface defects, estimates a likely grade, and compares raw versus graded market value so you can decide whether a card is worth sending to PSA, CGC, or BGS.
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Report updated September 9, 2026.