| MokomokoPhantom Nightmare · 033 | Phantom Nightmare | 033 | Common | €0.02 |
| Molten BehemothPharaonic Guardian · 001 | Pharaonic Guardian | 001 | Common | $0.13 |
| Molten Conduction FieldDuel Terminal 7a · 043 | Duel Terminal 7a | 043 | Duel Terminal Normal Parallel Rare | €0.12 |
| Molten DestructionMagic Ruler · 098 | Magic Ruler | 098 | Short Print | €0.05 |
| Molten Whirlwind WallDuel Terminal 5a · 050 | Duel Terminal 5a | 050 | Duel Terminal Normal Parallel Rare | €0.06 |
| Molten ZombieInvasion of Chaos · 064 | Invasion of Chaos | 064 | Common | €0.02 |
| Molting EscapeStardust Overdrive · 049 | Stardust Overdrive | 049 | Common | $0.19 |
| Monarchic PerfectionUnlisted Printings | Unlisted Printings | — | — | €0.25 |
| Monk FighterThe Lost Millennium · 019 | The Lost Millennium | 019 | Common | €0.11 |
| Monk of the TenyiRising Rampage · 043 | Rising Rampage | 043 | Rare | €0.02 |
| Mon LarvasUnlisted Printings | Unlisted Printings | — | — | — |
| MonocerosDuelist Revolution · 010 | Duelist Revolution | 010 | Common | $0.22 |
| Mono SynchronLegendary Collection 5D's Mega Pack · 026 | Legendary Collection 5D's Mega Pack | 026 | Rare | €3.13 |
| Monster Arms of AtlantisBeyond the Brave · 015 | Beyond the Brave | 015 | Super Rare | €0.12 |
| Monster AssortmentDawn of Majesty · 077 | Dawn of Majesty | 077 | Common | €0.07 |
| Monster EggLegend of Blue Eyes White Dragon · 017 | Legend of Blue Eyes White Dragon | 017 | Common | €0.02 |
| Monster ExpressChaos Impact · 000 | Chaos Impact | 000 | Rare | €0.06 |
| Monster EyeWorld Championship 2010 Card Pack · 008 | World Championship 2010 Card Pack | 008 | Rare | $35.83 |
| Monster GateAncient Sanctuary · 039 | Ancient Sanctuary | 039 | Common | €0.16 |
| Monster RebirthBattle of Chaos · 077 | Battle of Chaos | 077 | Common | €0.11 |
| Monster ReboneCrossed Souls · 079 | Crossed Souls | 079 | Super Rare | $0.30 |
| Monster RebornLegend of Blue Eyes White Dragon · 118 | Legend of Blue Eyes White Dragon | 118 | Ultra Rare | €0.02 |
| Monster Reborn RebornFlames of Destruction Sneak Peek Participation Card · 1 | Flames of Destruction Sneak Peek Participation Card | 1 | Ultra Rare | €0.05 |
| Monster RecoveryPharaoh's Servant · 066 | Pharaoh's Servant | 066 | Rare | €0.02 |
| Monster ReincarnationRise of Destiny · 045 | Rise of Destiny | 045 | Super Rare | €0.08 |
| Monster SlotsPhoton Shockwave · 047 | Photon Shockwave | 047 | Common | €0.07 |
| Monster TamerLegendary Collection 4: Joey's World Mega Pack · 222 | Legendary Collection 4: Joey's World Mega Pack | 222 | Common | $3.89 |
| Monstrous BirdUnlisted Printings | Unlisted Printings | — | — | — |
| MonsturtleUnlisted Printings | Unlisted Printings | — | — | — |
| Montage DragonThe Duelist Genesis · 014 | The Duelist Genesis | 014 | Ultra Rare | €0.65 |
| Moon Dance RitualJudgment of the Light · 089 | Judgment of the Light | 089 | Rare | €0.06 |
| Moon Dragon QuillaAbsolute Powerforce · 043 | Absolute Powerforce | 043 | Ultra Rare | €0.05 |
| Moon EnvoyMcDonald's Promotional Cards 2 · 019 | McDonald's Promotional Cards 2 | 019 | Common | $0.87 |
| Moon GardnaUnlisted Printings | Unlisted Printings | — | — | €0.03 |
| Moonlit PapillonGalactic Overlord · 014 | Galactic Overlord | 014 | Common | €0.10 |
| Moon MagicianUnlisted Printings | Unlisted Printings | — | — | €0.08 |
| Moon Mirror ShieldCrossed Souls · 081 | Crossed Souls | 081 | Rare | €0.25 |
| Moon of the Closed HeavenThe Infinite Forbidden · 098 | The Infinite Forbidden | 098 | Common | €0.14 |
| Moon TokenUnlisted Printings | Unlisted Printings | — | — | €0.24 |
| Mooyan CurryWorld Championship 2010 Card Pack · 020 | World Championship 2010 Card Pack | 020 | Rare | $21.98 |
| Morale BoostDark Crisis · 042 | Dark Crisis | 042 | Common | €0.03 |
| Moray of AvaricePower of the Elements · 084 | Power of the Elements | 084 | Ultra Rare | $0.63 |
| Moray of GreedStardust Overdrive · 058 | Stardust Overdrive | 058 | Short Print | €2.42 |
| MordschlagDark Neostorm · 065 | Dark Neostorm | 065 | Common | €0.05 |
| MoremarshmallonLegacy of Destruction · 005 | Legacy of Destruction | 005 | Super Rare | €0.17 |
| Morgana the Witch of EyesDuelist's Advance · 026 | Duelist's Advance | 026 | Super Rare | $0.34 |
| Morgan, the Enchantress of AvalonSoul Fusion · 089 | Soul Fusion | 089 | Ultra Rare | €0.27 |
| MorinphenMetal Raiders · 043 | Metal Raiders | 043 | Common | €0.02 |
| MormolithTactical Evolution · 085 | Tactical Evolution | 085 | Secret Rare | €0.09 |
| Morpheus, the Dream Mirror Black KnightRising Rampage · 088 | Rising Rampage | 088 | Ultra Rare | $0.74 |