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| Uncanny X-Men #221 | ||
| Marvel Comics, 9/87 | ||
| Chris Claremont story | 1st appearance of Mister Sinister | |
| Marc Silvestri & Dan Green cover & art | (Nathaniel Essex). | |
| Marauders appearance. | ||
| Books | CGC Label | CGC Total | Avg. Grade | 10 | 9.9 | 9.8 | 9.6 | 9.4 | 9.2 | 9.0 | 8.5 | 8.0 | 7.5 | 7.0 | 6.5 | 6.0 | 5.5 | 5.0 | 4.5 | 4.0 | 3.5 | 3.0 | 2.5 | 2.0 | 1.8 | 1.5 | 1.0 | 0.5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 BOOK | Universal | 9,213 | 9.19 | 0 0.00% | 4 0.04% | 2,293 24.9% | 2,226 49.1% | 1,523 66% | 937 76% | 711 84% | 506 89% | 340 93% | 239 95% | 143 97% | 106 98% | 74 99% | 37 99% | 32 100% | 13 100% | 13 100% | 9 100% | 5 100% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 1,222 | 9.19 | 0 0.00% | 1 0.08% | 294 24.1% | 310 49.5% | 202 66% | 122 76% | 85 83% | 65 88% | 48 92% | 30 95% | 28 97% | 10 98% | 14 99% | 6 99% | 4 100% | 1 100% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 18 | 9.27 | 0 0.00% | 0 0.00% | 2 11.1% | 4 33.3% | 5 61% | 2 72% | 4 94% | 0 94% | 0 94% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 7 | 8.71 | 0 0.00% | 0 0.00% | 1 14.3% | 3 57% | 1 71% | 0 71% | 1 86% | 0 86% | 0 86% | 0 86% | 0 86% | 0 86% | 0 86% | 0 86% | 0 86% | 0 86% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| Uncanny X-Men #221 (1987, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 4 9.9 | 25% 2,293 9.8 | 24% 2,226 9.6 | 17% 1,523 9.4 | 10% 937 9.2 | 8% 711 9.0 | 5% 506 8.5 | 4% 340 8.0 | 3% 239 7.5 | 2% 143 7.0 | 1% 106 6.5 | 1% 74 6.0 | 0% 37 5.5 | 0% 32 5.0 | 0% 13 4.5 | 0% 13 4.0 | 0% 9 3.5 | 0% 5 3.0 | 0% 2 2.5 | 0% 0 2.0 | 0% 0 1.8 | 0% 0 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||