24 printings of Acidic Slime
They range from $0.12 to $5.32 — a 44× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Friday Night Magic 2012 | F12 6 | — |
| 30th Anniversary Play Promos | P30A 17 | — |
| Secret Lair Drop | SLD 134 | $5.32 |
| Commander Legends | CMR 673 | $0.40 |
| Commander Masters | CMM 270 | $0.35 |
| Commander 2020 | C20 165 | $0.34 |
| Modern Horizons 3 Commander | M3C 218 | $0.34 |
| The List | PLST C18-127 | $0.33 |
| Commander Anthology | CMA 90 | $0.33 |
| Neon Dynasty Commander | NEC 112 | $0.30 |
| Zendikar Rising Commander | ZNC 59 | $0.29 |
| Forgotten Realms Commander | AFC 151 | $0.29 |
| Magic 2013 | M13 159 | $0.28 |
| Commander Legends | CMR 421 | $0.25 |
| Magic 2010 | M10 165 | $0.24 |
| Commander 2018 | C18 127 | $0.24 |
| Magic 2011 | M11 161 | $0.22 |
| Magic 2012 | M12 161 | $0.22 |
| Commander 2013 | C13 134 | $0.20 |
| Duel Decks: Jace vs. Vraska | DDM 64 | $0.19 |
| Teenage Mutant Ninja Turtles Eternal | TMC 48 | $0.18 |
| Commander Anthology Volume II | CM2 132 | $0.14 |
| Commander 2015 | C15 173 | $0.12 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.