7 printings of Copperline Gorge
They range from $0.61 to $2.34 — a 4× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Phyrexia: All Will Be One Promos | PONE 249s | — |
| Zendikar Rising Expeditions | ZNE 14 | $2.34 |
| Scars of Mirrodin | SOM 225 | $1.52 |
| Phyrexia: All Will Be One Promos | PONE 249p | $1.36 |
| Phyrexia: All Will Be One | ONE 371 | $0.96 |
| Phyrexia: All Will Be One | ONE 249 | $0.61 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.