| Meet and Greet "Sisay"Unfinity · 172 | Unfinity | 172 | Rare | €0.13 |
| Meet and Greet "Sisay"Unfinity · 264 | Unfinity | 264 | Rare | €0.15 |
| Meet and Greet "Sisay"Unfinity · 458 | Unfinity | 458 | Rare | $0.26 |
| Meet and Greet "Sisay"Unfinity · 515 | Unfinity | 515 | Rare | $0.25 |
| Mega FlareFinal Fantasy Commander · 456 | Final Fantasy Commander | 456 | Rare | €1.00 |
| Megantic SliverCommander Masters · 901 | Commander Masters | 901 | Rare | €0.66 |
| Megantic SliverMagic 2014 · 185 | Magic 2014 | 185 | Rare | €0.72 |
| Megantic SliverMagic 2014 Promos · 185★ | Magic 2014 Promos | 185★ | Rare | €0.46 |
| Megantic SliverSecret Lair Drop Tokens · 651 | Secret Lair Drop Tokens | 651 | Rare | €1.36 |
| Megantic SliverMagic Online Promos · 49830 | Magic Online Promos | 49830 | Rare | — |
| MegatheriumMercadian Masques · 259 | Mercadian Masques | 259 | Rare | €0.28 |
| MegatogMirrodin · 100 | Mirrodin | 100 | Rare | €0.34 |
| Megaton's FateFallout · 61 | Fallout | 61 | Rare | €0.23 |
| Megaton's FateFallout · 388 | Fallout | 388 | Rare | €0.36 |
| Megaton's FateFallout · 589 | Fallout | 589 | Rare | €1.46 |
| Megaton's FateFallout · 916 | Fallout | 916 | Rare | €1.33 |
| MeglonothConflux · 118 | Conflux | 118 | Rare | $0.36 |
| MeglonothSalvat 2011 · 173 | Salvat 2011 | 173 | Rare | €0.46 |
| Meishin, the Mind CageSaviors of Kamigawa · 44 | Saviors of Kamigawa | 44 | Rare | €1.06 |
| Melek, Izzet ParagonCommander 2015 · 227 | Commander 2015 | 227 | Rare | $0.23 |
| Melek, Izzet ParagonCommander 2020 · 220 | Commander 2020 | 220 | Rare | €0.10 |
| Melek, Izzet ParagonDragon's Maze · 84 | Dragon's Maze | 84 | Rare | $0.26 |
| Melek, Izzet ParagonDragon's Maze Promos · 84 | Dragon's Maze Promos | 84 | Rare | €1.82 |
| Melek, Izzet ParagonMagic Online Promos · 48578 | Magic Online Promos | 48578 | Rare | — |
| Meletis CharlatanTheros · 54 | Theros | 54 | Rare | €0.13 |
| Melira, Sylvok OutcastNew Phyrexia · 115 | New Phyrexia | 115 | Rare | €1.97 |
| Melira, the Living CurePhyrexia: All Will Be One · 209 | Phyrexia: All Will Be One | 209 | Rare | €0.09 |
| Melira, the Living CurePhyrexia: All Will Be One · 333 | Phyrexia: All Will Be One | 333 | Rare | €0.24 |
| Melira, the Living CurePhyrexia: All Will Be One · 469 | Phyrexia: All Will Be One | 469 | Rare | €1.42 |
| Melira, the Living CurePhyrexia: All Will Be One Promos · 209p | Phyrexia: All Will Be One Promos | 209p | Rare | €0.24 |
| Melira, the Living CurePhyrexia: All Will Be One Promos · 209s | Phyrexia: All Will Be One Promos | 209s | Rare | €0.54 |
| Meloku the Clouded MirrorChampions of Kamigawa · 74 | Champions of Kamigawa | 74 | Rare | €0.75 |
| Meloku the Clouded MirrorCommander Legends · 399 | Commander Legends | 399 | Rare | €0.66 |
| Meloku the Clouded MirrorModern Masters · 52 | Modern Masters | 52 | Rare | €0.64 |
| MeltdownSecret Lair Drop Tokens · 2296 | Secret Lair Drop Tokens | 2296 | Rare | $4.43 |
| MemnarchArchenemy · 112 | Archenemy | 112 | Rare | €3.98 |
| MemnarchDarksteel · 129 | Darksteel | 129 | Rare | €2.86 |
| MemnarchSecret Lair Drop Tokens · 1626 | Secret Lair Drop Tokens | 1626 | Rare | €5.40 |
| MemnarchitectUnknown Event · RU02 | Unknown Event | RU02 | Rare | — |
| Memnarch, the WardenReality Fracture Commander · 15 | Reality Fracture Commander | 15 | Rare | $0.79 |
| Memnarch, the WardenReality Fracture Commander · 100 | Reality Fracture Commander | 100 | Rare | €1.21 |
| Memorial VaultEdge of Eternities · 145 | Edge of Eternities | 145 | Rare | €0.13 |
| Memorial VaultEdge of Eternities · 336 | Edge of Eternities | 336 | Rare | €0.02 |
| Memorial VaultEdge of Eternities Promos · 145p | Edge of Eternities Promos | 145p | Rare | €0.07 |
| Memorial VaultEdge of Eternities Promos · 145s | Edge of Eternities Promos | 145s | Rare | $0.44 |
| MemoricideScars of Mirrodin Promos · 69★ | Scars of Mirrodin Promos | 69★ | Rare | €0.35 |
| MemoricideScars of Mirrodin · 69 | Scars of Mirrodin | 69 | Rare | €0.17 |
| MemoricideMagic Online Promos · 37863 | Magic Online Promos | 37863 | Rare | — |
| Memories ReturningFinal Fantasy · 63 | Final Fantasy | 63 | Rare | €0.23 |
| Memories ReturningFinal Fantasy · 331 | Final Fantasy | 331 | Rare | $1.10 |