 Mental Nano Bracer | Artifact | – | 20,000 |
 Mental Peace Pipe | Alchemy | – | 10,000 |
 Mental Peace Pipe | Alchemy | – | 20,500 |
  Merchant's Trade Unlocker | Alchemy | Uncommon | – |
 Metal | Weapon | – | 10,000 |
  Metal scraps | Searchable | Common | 300 |
 Meteoric Ingot | Mining | Common | 1,734 |
 Meteoric Metal | Mining | Common | 800 |
 "Microwave Madness" Page - 08 | Quest | Common | – |
 "Microwave Madness" Page - 11 | Quest | Common | – |
 "Microwave Madness" Page - 14 | Quest | Common | – |
 "Microwave Madness" Page - 22 | Quest | Common | – |
 "Microwave Madness" Page - 63 | Quest | Common | – |
 Midge Poison | Quest | Common | – |
 Midnight Sanctum | Weapon | – | 100,000 |
 Midnight Sever | Weapon | – | 100,000 |
 Mindplague Essence | Quest | Common | – |
 Mine Cart Parts | Quest | Common | – |
| Mine Gate Key | – | – | – |
 Missing Note | Quest | Common | – |
 Missing Pages | Quest | Common | – |
 Missing Persons Poster | Quest | Common | – |
 Mobius Mask | Quest | Common | – |
 Mocha Caramel Latte | Quest | Common | – |
 Modular Glove | Artifact | – | 20,000 |
 Monitor Lizard | Rune | – | 10,500 |
 Monster Eye Pizza | Dishes | – | 2,200 |
 Monster Mike Sandwich | Dishes | – | 2,919 |
 Monster Plant Tacos | Dishes | – | 6,500 |
 Moonlight Gauntlets | Weapon | – | 675,000 |
| Moonlight Ruins | Skin | – | – |
| Moonlight Shrine | Skin | – | – |
 Moonstone | Mining | Uncommon | 114 |
 Morick's Evidence Jar | Quest | Common | – |
 Morick's Evidence Jar | Quest | Common | – |
 Morick's Evidence Jar | Quest | Common | – |
 Morphers G | Alchemy | – | 1,500 |
 Mortimer Gloomsworth Thank You Letter | Quest | Common | – |
 Motorbike Rustrider | Skin | – | 20,000 |
 Mr. Fuzzywuzzy | Quest | Common | – |
 Mudroot Tuber | Quest | Common | – |
  Mutated leaf | Food | Rare | 3,952 |
 Mysterious Bottle | Quest | Common | – |
 Mysterious Green Mask | Quest | Common | – |
 Mysterious Luchador Mask | Quest | Common | – |
 Mysterious Orange Mask | Quest | Common | – |
 Mysterious Pink Mask | Quest | Common | – |
 Mystic Harmonizer | Chip | – | 150,000 |
 Mystic Tempo | Artifact | – | 135,000 |
 Nano Tissue | Artifact | – | 2,000 |