| MasticoreWorld Championship Decks 1999 Tokens · kb143b | World Championship Decks 1999 Tokens | kb143b | Rare | €6.68 |
| MasticoreVintage Masters · 275 | Vintage Masters | 275 | Rare | — |
| Masumaro, First to LiveSaviors of Kamigawa · 136 | Saviors of Kamigawa | 136 | Rare | €0.36 |
| Mathas, Fiend SeekerDouble Masters 2022 · 252 | Double Masters 2022 | 252 | Rare | €0.40 |
| Mathas, Fiend SeekerDouble Masters 2022 · 523 | Double Masters 2022 | 523 | Rare | €2.25 |
| Mathise, Surge ChannelerUniverses Within · 25 | Universes Within | 25 | Rare | €4.40 |
| Mathise, Surge ChannelerSecret Lair Drop Tokens · 1238 | Secret Lair Drop Tokens | 1238 | Rare | €6.63 |
| Math is for BlockersUnknown Event · RR16 | Unknown Event | RR16 | Rare | — |
| Matoya, Archon ElderFinal Fantasy · 62 | Final Fantasy | 62 | Rare | €0.66 |
| Matoya, Archon ElderFinal Fantasy · 439 | Final Fantasy | 439 | Rare | €2.53 |
| Matoya, Archon ElderFinal Fantasy Promos · 62s | Final Fantasy Promos | 62s | Rare | €3.13 |
| Matter ReshaperCommander Masters · 806 | Commander Masters | 806 | Rare | €0.49 |
| Matter ReshaperOath of the Gatewatch · 6 | Oath of the Gatewatch | 6 | Rare | €0.42 |
| Matter ReshaperOath of the Gatewatch Promos · 6s | Oath of the Gatewatch Promos | 6s | Rare | €2.00 |
| Matter ReshaperSecret Lair Drop Tokens · 1048 | Secret Lair Drop Tokens | 1048 | Rare | €2.50 |
| Matter ReshaperExplorer Anthology 2 · 2 | Explorer Anthology 2 | 2 | Rare | — |
| Matt Murdock, Justice SeekerMarvel Super Heroes Commander · 602 | Marvel Super Heroes Commander | 602 | Rare | $0.90 |
| Matzalantli, the Great Door // The CoreThe Lost Caverns of Ixalan · 256 | The Lost Caverns of Ixalan | 256 | Rare | $2.13 |
| Matzalantli, the Great Door // The CoreThe Lost Caverns of Ixalan · 387 | The Lost Caverns of Ixalan | 387 | Rare | €3.36 |
| Maul of the SkyclavesFoundations Jumpstart · 223 | Foundations Jumpstart | 223 | Rare | €0.24 |
| Maul of the SkyclavesMarch of the Machine Commander · 195 | March of the Machine Commander | 195 | Rare | €0.27 |
| Maul of the SkyclavesPhyrexia: All Will Be One Commander · 80 | Phyrexia: All Will Be One Commander | 80 | Rare | €0.22 |
| Maul of the SkyclavesZendikar Rising Promos · 27p | Zendikar Rising Promos | 27p | Rare | $0.31 |
| Maul of the SkyclavesZendikar Rising Promos · 27s | Zendikar Rising Promos | 27s | Rare | €0.87 |
| Maul of the SkyclavesZendikar Rising · 27 | Zendikar Rising | 27 | Rare | €0.12 |
| Maul of the SkyclavesZendikar Rising · 320 | Zendikar Rising | 320 | Rare | €0.47 |
| Maul of the SkyclavesMagic Online Promos · 83762 | Magic Online Promos | 83762 | Rare | — |
| Maul SplicerDCI Promos · 72 | DCI Promos | 72 | Rare | €0.24 |
| Mausoleum SecretsGuilds of Ravnica · 75 | Guilds of Ravnica | 75 | Rare | €0.68 |
| Mausoleum SecretsGuilds of Ravnica Promos · 75p | Guilds of Ravnica Promos | 75p | Rare | €0.74 |
| Mausoleum SecretsGuilds of Ravnica Promos · 75s | Guilds of Ravnica Promos | 75s | Rare | €1.39 |
| Mausoleum WandererEldritch Moon · 69 | Eldritch Moon | 69 | Rare | $0.32 |
| Mausoleum WandererInnistrad Remastered · 74 | Innistrad Remastered | 74 | Rare | $0.30 |
| Mausoleum WandererInnistrad Remastered · 305 | Innistrad Remastered | 305 | Rare | $0.59 |
| Mausoleum WandererInnistrad Remastered · 360 | Innistrad Remastered | 360 | Rare | $0.28 |
| Mausoleum WandererEldritch Moon Promos Tokens · 69s | Eldritch Moon Promos Tokens | 69s | Rare | €1.51 |
| Mausoleum WandererExplorer Anthology 1 · 4 | Explorer Anthology 1 | 4 | Rare | — |
| Mausoleum WandererShadows over Innistrad Remastered · 81 | Shadows over Innistrad Remastered | 81 | Rare | — |
| Mavren Fein, Dusk ApostleThe Lost Caverns of Ixalan Commander · 133 | The Lost Caverns of Ixalan Commander | 133 | Rare | $0.33 |
| Mavren Fein, Dusk ApostleIxalan Promos · 24p | Ixalan Promos | 24p | Rare | €2.02 |
| Mavren Fein, Dusk ApostleIxalan Promos · 24s | Ixalan Promos | 24s | Rare | €2.34 |
| Mavren Fein, Dusk ApostleIxalan · 24 | Ixalan | 24 | Rare | €0.58 |
| MawcorSeventh Edition · 87 | Seventh Edition | 87 | Rare | €0.29 |
| MawcorSeventh Edition · 87★ | Seventh Edition | 87★ | Rare | $0.32 |
| MawcorTempest · 75 | Tempest | 75 | Rare | €0.33 |
| MawcorTempest Remastered · 59 | Tempest Remastered | 59 | Rare | — |
| MawlocWarhammer 40,000 Commander · 133 | Warhammer 40,000 Commander | 133 | Rare | $3.24 |
| MawlocWarhammer 40,000 Commander · 133★ | Warhammer 40,000 Commander | 133★ | Rare | $10.80 |
| Maximum CarnageMarvel's Spider-Man Promos · 83s | Marvel's Spider-Man Promos | 83s | Rare | €1.52 |
| Maximum CarnageMarvel's Spider-Man · 83 | Marvel's Spider-Man | 83 | Rare | €0.44 |