4 printings of Coralhelm Guide
They range from $0.03 to $0.23 — a 8× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| The List | PLST BBD-116 | $0.23 |
| Masters 25 | A25 49 | $0.05 |
| Battle for Zendikar | BFZ 74 | $0.03 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.