Mewtwo & Mew GX SM191/248 SM Black Star Promos Pregrading Report
Card photos and centering analysis
This is a GradeValue pregrading report for Mewtwo & Mew GX SM191/248 SM Black Star Promos. Based on centering and surface analysis, the estimated grade is approximately TAG 5.5. Raw copies are worth about 463.15 SGD, while a graded TAG 10 is around 2,420.74 SGD. That works out to an estimated grading ROI of about 0.9x. Use this analysis to decide whether to grade it or keep it raw.
Grade
Estimated pregrade: TAG 5.5. This is a pre-submission estimate from centering and surface condition.
Target grade: TAG 8.5.
Centering
- Front: 57/43 top-to-bottom, 61/39 left-to-right
- Back: 51/49 top-to-bottom, 47/53 left-to-right
Surface condition
7 surface defects flagged (7 on the back). Noted types: whitening.
Corner analysis
- Back corners: 100/100
Value: raw vs graded
| Raw / ungraded | 463.15 SGD |
|---|---|
| PSA 9 | 659.35 SGD |
| PSA 10 | 2,420.74 SGD |
| BGS 10 | 5,749.71 SGD |
| CGC 10 | 1,351.63 SGD |
| Estimated grading ROI | 0.9x |
How GradeValue pregrading works
GradeValue 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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Related research
Grading ROI for the whole set, from live prices.
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Report updated June 14, 2026.