| Open the VaultsFallout · 696 | Fallout | 696 | Rare | €1.25 |
| Open the VaultsFallout · 983 | Fallout | 983 | Rare | €1.12 |
| Open the WayMarch of the Machine: The Aftermath · 23 | March of the Machine: The Aftermath | 23 | Rare | €1.53 |
| Open the WayMarch of the Machine: The Aftermath · 73 | March of the Machine: The Aftermath | 73 | Rare | €4.08 |
| Open the WayMarch of the Machine: The Aftermath · 123 | March of the Machine: The Aftermath | 123 | Rare | €2.85 |
| Open the WayMarch of the Machine: The Aftermath · 163 | March of the Machine: The Aftermath | 163 | Rare | $4.74 |
| Open the WayMarch of the Machine: The Aftermath Promos · 23p | March of the Machine: The Aftermath Promos | 23p | Rare | €3.98 |
| Open the WaySecrets of Strixhaven Commander · 280 | Secrets of Strixhaven Commander | 280 | Rare | $0.67 |
| OphidianFriday Night Magic 2001 · 7 | Friday Night Magic 2001 | 7 | Rare | €2.85 |
| OphiomancerCommander 2013 · 84 | Commander 2013 | 84 | Rare | €1.75 |
| OphiomancerCommander Collection: Black Tokens · 3 | Commander Collection: Black Tokens | 3 | Rare | €2.01 |
| OphiomancerJumpstart 2022 · 452 | Jumpstart 2022 | 452 | Rare | €1.47 |
| OphiomancerModern Horizons 3 · 276 | Modern Horizons 3 | 276 | Rare | €0.92 |
| OphiomancerSecrets of Strixhaven Commander · 118 | Secrets of Strixhaven Commander | 118 | Rare | $1.35 |
| OphiomancerTarkir: Dragonstorm Commander · 193 | Tarkir: Dragonstorm Commander | 193 | Rare | $1.15 |
| OphiomancerHistoric Anthology 6 · 3 | Historic Anthology 6 | 3 | Rare | — |
| Opportunistic DragonForgotten Realms Commander · 134 | Forgotten Realms Commander | 134 | Rare | €0.21 |
| Opportunistic DragonThrone of Eldraine · 133 | Throne of Eldraine | 133 | Rare | €0.15 |
| Opportunistic DragonThrone of Eldraine · 364 | Throne of Eldraine | 364 | Rare | $0.45 |
| Opportunistic DragonThrone of Eldraine Promos · 133p | Throne of Eldraine Promos | 133p | Rare | €0.29 |
| Opportunistic DragonThrone of Eldraine Promos · 133s | Throne of Eldraine Promos | 133s | Rare | €0.56 |
| Opportunistic DragonThrone of Eldraine Promos · 133★ | Throne of Eldraine Promos | 133★ | Rare | $0.31 |
| Opportunistic DragonTarkir: Dragonstorm Commander · 228 | Tarkir: Dragonstorm Commander | 228 | Rare | €0.13 |
| OppositionSeventh Edition · 92 | Seventh Edition | 92 | Rare | $2.19 |
| OppositionSeventh Edition · 92★ | Seventh Edition | 92★ | Rare | $2.19 |
| OppositionDominaria Remastered · 62 | Dominaria Remastered | 62 | Rare | $1.02 |
| OppositionDominaria Remastered · 290 | Dominaria Remastered | 290 | Rare | $0.45 |
| OppositionUrza's Destiny · 40 | Urza's Destiny | 40 | Rare | $4.88 |
| OppositionWorld Championship Decks 2001 Tokens · ab92 | World Championship Decks 2001 Tokens | ab92 | Rare | €0.77 |
| OppositionWorld Championship Decks 2002 Tokens · shh92 | World Championship Decks 2002 Tokens | shh92 | Rare | €0.93 |
| Opposition AgentCommander Legends · 141 | Commander Legends | 141 | Rare | $19.42 |
| Opposition AgentCommander Legends · 651 | Commander Legends | 651 | Rare | €25.92 |
| Opposition AgentCommander Legends Promos · 141p | Commander Legends Promos | 141p | Rare | €24.99 |
| Opposition AgentMagic Online Promos · 86078 | Magic Online Promos | 86078 | Rare | — |
| OppressionSeventh Edition · 152 | Seventh Edition | 152 | Rare | €2.61 |
| OppressionSeventh Edition · 152★ | Seventh Edition | 152★ | Rare | $5.05 |
| OppressionThe List Tokens · USG-143 | The List Tokens | USG-143 | Rare | €4.81 |
| OppressionSecret Lair Drop Tokens · 1424 | Secret Lair Drop Tokens | 1424 | Rare | €8.52 |
| OppressionUrza's Saga · 143 | Urza's Saga | 143 | Rare | €4.50 |
| OppressionWilds of Eldraine: Enchanting Tales · 32 | Wilds of Eldraine: Enchanting Tales | 32 | Rare | €1.59 |
| OptSecret Lair Drop Tokens · 111 | Secret Lair Drop Tokens | 111 | Rare | $3.48 |
| OptSecret Lair Drop Tokens · 2068 | Secret Lair Drop Tokens | 2068 | Rare | €4.79 |
| OracleVanguard Series · 304 | Vanguard Series | 304 | Rare | €8.54 |
| Oracle en-VecTempest · 31 | Tempest | 31 | Rare | $0.56 |
| Oracle of BonesBorn of the Gods · 103 | Born of the Gods | 103 | Rare | €0.17 |
| Oracle of Mul DayaDouble Masters 2022 · 154 | Double Masters 2022 | 154 | Rare | €2.93 |
| Oracle of Mul DayaDouble Masters 2022 · 370 | Double Masters 2022 | 370 | Rare | €6.84 |
| Oracle of Mul DayaDouble Masters 2022 · 464 | Double Masters 2022 | 464 | Rare | €6.63 |
| Oracle of Mul DayaEdge of Eternities Commander · 102 | Edge of Eternities Commander | 102 | Rare | $2.50 |
| Oracle of Mul DayaJumpstart · 415 | Jumpstart | 415 | Rare | €2.50 |