8 printings of Goblin Piker
They range from $0.03 to $0.32 — a 11× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Ninth Edition | 9ED 194★ | — |
| Duels of the Planeswalkers | DPA 45 | $0.32 |
| Magic 2011 | M11 142 | $0.14 |
| Ninth Edition | 9ED 194 | $0.12 |
| Tenth Edition | 10E 209 | $0.08 |
| Magic 2012 | M12 141 | $0.04 |
| Magic 2010 | M10 140 | $0.03 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.