Raw, it’s a $0.44 card. Slabbed as a PSA 10 it sells for 1024× that, and PSA has only ever handed out 1 of them.
| May · 1 sale · median $500 · +1686% vs Nov | |||||
| 20 | eBay | 2015 Pokemon XY Roaring Skies Voltorb Reverse Holo Foil #21 PSA 10 - POP 1 #21 | +1686% | $500 | |
| November 2024 · 1 sale · median $28 | |||||
| 20 | eBay | Voltorb Reverse Holo Common #21 - PSA GEM MINT 10 - XY Roaring Skies - Pokemon #21 | — | $28 | |