| Mox PearlLimited Edition Beta · 264 | Limited Edition Beta | 264 | Rare | €6,129.15 |
| Mox PearlVintage Championship · 2006 | Vintage Championship | 2006 | Rare | — |
| Mox PearlMagic Online Promos · 46892 | Magic Online Promos | 46892 | Rare | — |
| Mox PoisonMystery Booster 2 Tokens · 608 | Mystery Booster 2 Tokens | 608 | Rare | $0.95 |
| Mox PoisonUnknown Event · RA11b | Unknown Event | RA11b | Rare | $0.99 |
| Mox RubyUnlimited Edition · 265 | Unlimited Edition | 265 | Rare | $2,499.99 |
| Mox Ruby30th Anniversary Edition · 261 | 30th Anniversary Edition | 261 | Rare | €573.45 |
| Mox Ruby30th Anniversary Edition · 558 | 30th Anniversary Edition | 558 | Rare | €2,000.00 |
| Mox RubyCollectors' Edition · 265 | Collectors' Edition | 265 | Rare | €595.36 |
| Mox RubyIntl. Collectors' Edition · 265 | Intl. Collectors' Edition | 265 | Rare | $591.66 |
| Mox RubyLimited Edition Alpha · 264 | Limited Edition Alpha | 264 | Rare | €8,111.66 |
| Mox RubyLimited Edition Beta · 265 | Limited Edition Beta | 265 | Rare | €4,914.33 |
| Mox RubyVintage Championship · 2008 | Vintage Championship | 2008 | Rare | — |
| Mox RubyMagic Online Promos · 46952 | Magic Online Promos | 46952 | Rare | — |
| Mox SapphireUnlimited Edition · 266 | Unlimited Edition | 266 | Rare | €3,406.13 |
| Mox Sapphire30th Anniversary Edition · 262 | 30th Anniversary Edition | 262 | Rare | $583.58 |
| Mox Sapphire30th Anniversary Edition · 559 | 30th Anniversary Edition | 559 | Rare | €782.12 |
| Mox SapphireCollectors' Edition · 266 | Collectors' Edition | 266 | Rare | $647.32 |
| Mox SapphireIntl. Collectors' Edition · 266 | Intl. Collectors' Edition | 266 | Rare | €874.38 |
| Mox SapphireLimited Edition Alpha · 265 | Limited Edition Alpha | 265 | Rare | €20,089.89 |
| Mox SapphireLimited Edition Beta · 266 | Limited Edition Beta | 266 | Rare | €7,179.15 |
| Mox SapphireVintage Championship · 2010 | Vintage Championship | 2010 | Rare | — |
| Mox SapphireMagic Online Promos · 46902 | Magic Online Promos | 46902 | Rare | — |
| Mr. Wiggles, Helpful ButterflyUnknown Event · RG03b | Unknown Event | RG03b | Rare | — |
| Ms. Marvel, Kamala KhanMarvel Super Heroes · 67 | Marvel Super Heroes | 67 | Rare | €0.22 |
| Ms. Marvel, Kamala KhanMarvel Super Heroes · 361 | Marvel Super Heroes | 361 | Rare | €0.38 |
| Muddle the MixtureSecret Lair Drop Tokens · 1254 | Secret Lair Drop Tokens | 1254 | Rare | €4.00 |
| MudholeOdyssey · 208 | Odyssey | 208 | Rare | €0.28 |
| MudholeSecret Lair Drop Tokens · 62 | Secret Lair Drop Tokens | 62 | Rare | €0.02 |
| MudslideIce Age · 204 | Ice Age | 204 | Rare | €4.92 |
| MudslideMasters Edition II · 136 | Masters Edition II | 136 | Rare | — |
| Muerra, Trash TacticianBloomburrow · 227 | Bloomburrow | 227 | Rare | €0.21 |
| Muerra, Trash TacticianBloomburrow · 352 | Bloomburrow | 352 | Rare | €106.29 |
| Muerra, Trash TacticianBloomburrow Promos · 227p | Bloomburrow Promos | 227p | Rare | €0.19 |
| Muerra, Trash TacticianBloomburrow Promos · 227s | Bloomburrow Promos | 227s | Rare | $0.95 |
| Mukotai SoulripperKamigawa: Neon Dynasty · 113 | Kamigawa: Neon Dynasty | 113 | Rare | €0.14 |
| Mukotai SoulripperKamigawa: Neon Dynasty · 381 | Kamigawa: Neon Dynasty | 381 | Rare | €0.24 |
| Mukotai SoulripperKamigawa: Neon Dynasty · 458 | Kamigawa: Neon Dynasty | 458 | Rare | €0.24 |
| Mukotai SoulripperKamigawa: Neon Dynasty Promos · 113p | Kamigawa: Neon Dynasty Promos | 113p | Rare | $0.06 |
| Mukotai SoulripperKamigawa: Neon Dynasty Promos · 113s | Kamigawa: Neon Dynasty Promos | 113s | Rare | €0.17 |
| Mukotai SoulripperMagic Online Promos · 97953 | Magic Online Promos | 97953 | Rare | — |
| Mul Daya ChannelersRise of the Eldrazi · 198 | Rise of the Eldrazi | 198 | Rare | €0.62 |
| Muldrotha, the GravetideFinal Fantasy: Through the Ages · 57 | Final Fantasy: Through the Ages | 57 | Rare | €2.18 |
| MulldrifterFriday Night Magic 2009 · 6 | Friday Night Magic 2009 | 6 | Rare | €4.42 |
| MulldrifterSecret Lair Drop Tokens · 168 | Secret Lair Drop Tokens | 168 | Rare | $2.54 |
| MulldrifterSecret Lair Drop Tokens · 373 | Secret Lair Drop Tokens | 373 | Rare | $2.37 |
| MulldrifterSecret Lair Drop Tokens · 374 | Secret Lair Drop Tokens | 374 | Rare | $2.81 |
| MulldrifterSecret Lair Drop Tokens · 1887 | Secret Lair Drop Tokens | 1887 | Rare | $4.27 |
| MultaniVanguard Series · 303 | Vanguard Series | 303 | Rare | €2.97 |
| Multani, Maro-SorcererUrza's Legacy · 107 | Urza's Legacy | 107 | Rare | €15.17 |