15 printings of Ravenous Rats
They range from $0.12 to $5.47 — a 46× 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 157★ | — |
| Eighth Edition | 8ED 158★ | — |
| Portal Second Age | P02 87 | $5.47 |
| Duels of the Planeswalkers | DPA 31 | $3.49 |
| Duel Decks Anthology: Garruk vs. Liliana | GVL 37 | $0.60 |
| Starter 1999 | S99 86 | $0.55 |
| World Championship Decks 1999 | WC99 js68 | $0.45 |
| Urza's Destiny | UDS 68 | $0.33 |
| Invasion | INV 120 | $0.28 |
| Duel Decks: Izzet vs. Golgari | DDJ 49 | $0.28 |
| Duel Decks: Garruk vs. Liliana | DDD 37 | $0.25 |
| Magic 2013 | M13 106 | $0.20 |
| Tenth Edition | 10E 171 | $0.17 |
| Ninth Edition | 9ED 157 | $0.12 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.