7 printings of Hollow Dogs
They range from $0.11 to $0.32 — 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.
| Seventh Edition | 7ED 141★ | — |
| Ninth Edition | 9ED 139★ | — |
| Beatdown Box Set | BTD 28 | $0.32 |
| Urza's Saga | USG 137 | $0.25 |
| Seventh Edition | 7ED 141 | $0.20 |
| Ninth Edition | 9ED 139 | $0.11 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.