| One with the MachineAetherdrift Commander · 80 | Aetherdrift Commander | 80 | Rare | €0.16 |
| One with the MachineCore Set 2019 · 66 | Core Set 2019 | 66 | Rare | €0.22 |
| One with the MachineFallout · 179 | Fallout | 179 | Rare | €0.29 |
| One with the MachineCore Set 2019 Promos · 66s | Core Set 2019 Promos | 66s | Rare | €1.14 |
| One with the MachineFallout · 462 | Fallout | 462 | Rare | $0.35 |
| One with the MachineFallout · 707 | Fallout | 707 | Rare | $1.04 |
| One with the MachineFallout · 990 | Fallout | 990 | Rare | €1.56 |
| Oni of Wild Places AvatarMagic Online Avatars · 50 | Magic Online Avatars | 50 | Rare | — |
| On the TrailMurders at Karlov Manor Commander · 39 | Murders at Karlov Manor Commander | 39 | Rare | €1.00 |
| On the TrailMurders at Karlov Manor Commander · 349 | Murders at Karlov Manor Commander | 349 | Rare | €2.58 |
| On Thin IceModern Horizons · 20 | Modern Horizons | 20 | Rare | $0.71 |
| OnuletRevised Edition · 269 | Revised Edition | 269 | Rare | $0.52 |
| OnuletFourth Edition Foreign Black Border · 340 | Fourth Edition Foreign Black Border | 340 | Rare | €3.38 |
| OnuletFourth Edition · 340 | Fourth Edition | 340 | Rare | $0.34 |
| OnuletForeign Black Border · 269 | Foreign Black Border | 269 | Rare | €1.96 |
| OnuletSummer Magic / Edgar · 269 | Summer Magic / Edgar | 269 | Rare | €375.00 |
| On Wings of GoldAetherdrift Commander · 5 | Aetherdrift Commander | 5 | Rare | $0.48 |
| On Wings of GoldAetherdrift Commander · 21 | Aetherdrift Commander | 21 | Rare | €0.02 |
| Oona, Queen of the FaeModern Masters · 193 | Modern Masters | 193 | Rare | €0.85 |
| Oona, Queen of the FaeShadowmoor · 172 | Shadowmoor | 172 | Rare | €0.76 |
| Oona, Queen of the FaeWilds of Eldraine Commander · 142 | Wilds of Eldraine Commander | 142 | Rare | €0.42 |
| Oona, Queen of the FaeZendikar Rising Commander · 98 | Zendikar Rising Commander | 98 | Rare | €0.15 |
| Oona's BlackguardDCI Promos · 15 | DCI Promos | 15 | Rare | €1.43 |
| Oona's ProwlerDouble Masters 2022 · 85 | Double Masters 2022 | 85 | Rare | €0.20 |
| Oona's ProwlerDouble Masters 2022 · 443 | Double Masters 2022 | 443 | Rare | €0.38 |
| Oona's ProwlerLorwyn · 133 | Lorwyn | 133 | Rare | €0.39 |
| OozeaviteUnknown Event · RG05b | Unknown Event | RG05b | Rare | — |
| Ooze FluxGatecrash · 128 | Gatecrash | 128 | Rare | €0.17 |
| Ooze GardenShards of Alara · 143 | Shards of Alara | 143 | Rare | €0.16 |
| Opal ArchangelUrza's Saga · 23 | Urza's Saga | 23 | Rare | €1.84 |
| Opal AvengerUrza's Legacy · 15 | Urza's Legacy | 15 | Rare | $0.29 |
| OpalescenceUrza's Destiny · 13 | Urza's Destiny | 13 | Rare | €31.91 |
| OpalescenceWorld Championship Decks 2000 Tokens · tvdl13 | World Championship Decks 2000 Tokens | tvdl13 | Rare | €13.93 |
| Opal-Eye, Konda's YojimboBetrayers of Kamigawa · 17 | Betrayers of Kamigawa | 17 | Rare | €1.37 |
| Opal GuardianTime Spiral · 30 | Time Spiral | 30 | Rare | €0.12 |
| Opaline SliverSecret Lair Drop Tokens · 667 | Secret Lair Drop Tokens | 667 | Rare | €1.34 |
| Opal TitanUrza's Saga · 26 | Urza's Saga | 26 | Rare | $0.42 |
| Open the ArmorySecret Lair Drop Tokens · 2089 | Secret Lair Drop Tokens | 2089 | Rare | €4.59 |
| Open the GravesCore Set 2019 · 112 | Core Set 2019 | 112 | Rare | €0.52 |
| Open the GravesMidnight Hunt Commander · 126 | Midnight Hunt Commander | 126 | Rare | €0.19 |
| Open the GravesCore Set 2019 Promos · 112p | Core Set 2019 Promos | 112p | Rare | €0.72 |
| Open the GravesCore Set 2019 Promos · 112s | Core Set 2019 Promos | 112s | Rare | €1.40 |
| Open the GravesStarter Commander Decks · 97 | Starter Commander Decks | 97 | Rare | $0.34 |
| Open the GravesFoundations Commander · 121 | Foundations Commander | 121 | Rare | $0.21 |
| Open the VaultsDouble Masters · 24 | Double Masters | 24 | Rare | €0.52 |
| Open the VaultsCommander 2015 · 77 | Commander 2015 | 77 | Rare | €0.35 |
| Open the VaultsCommander 2016 · 72 | Commander 2016 | 72 | Rare | €0.31 |
| Open the VaultsMagic 2010 · 21 | Magic 2010 | 21 | Rare | €0.53 |
| Open the VaultsFallout · 168 | Fallout | 168 | Rare | €0.25 |
| Open the VaultsFallout · 455 | Fallout | 455 | Rare | €0.32 |