4 printings of Azorius Herald
They range from $0.06 to $0.16 — a 3× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| RNA Guild Kit | GK2 2 | $0.16 |
| Dissension | DIS 2 | $0.13 |
| The List | PLST GK2-2 | $0.06 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.