| Jurrac SpinosDuel Terminal 3 · 016 | Duel Terminal 3 | 016 | Duel Terminal Rare Parallel Rare | €0.09 |
| Jurrac StaurikoDuel Terminal 3 · 069 | Duel Terminal 3 | 069 | Duel Terminal Normal Parallel Rare | €0.22 |
| Jurrac StegoBattles of Legend: Monster Mayhem · 017 | Battles of Legend: Monster Mayhem | 017 | New | €0.16 |
| Jurrac TitanoDuel Terminal 3 · 067 | Duel Terminal 3 | 067 | Duel Terminal Super Parallel Rare | €0.43 |
| Jurrac TokenUnlisted Printings | Unlisted Printings | — | — | — |
| Jurrac TyrannusDuel Terminal 2 · 068 | Duel Terminal 2 | 068 | Duel Terminal Super Parallel Rare | €0.06 |
| Jurrac VeloDuel Terminal 2 · 066 | Duel Terminal 2 | 066 | Duel Terminal Rare Parallel Rare | €0.12 |
| Jurrac VelphitoDuel Terminal 3 · 037 | Duel Terminal 3 | 037 | Duel Terminal Super Parallel Rare | €0.16 |
| Jurrac VolcanoBattles of Legend: Monster Mayhem · 019 | Battles of Legend: Monster Mayhem | 019 | Secret Rare | €4.70 |
| Just DessertsStarter Deck: Kaiba · 040 | Starter Deck: Kaiba | 040 | Common | €0.02 |
| Just Flip a CoinBeyond the Brave · 083 | Beyond the Brave | 083 | Common | €0.06 |
| Justi-BreakCyberdark Impact Sneak Peek Participation Card · 004 | Cyberdark Impact Sneak Peek Participation Card | 004 | Ultra Rare | €0.05 |
| Justice BringerDuelist Pack: Yusei 3 · 013 | Duelist Pack: Yusei 3 | 013 | Ultra Rare | $0.77 |
| Justice of ProphecyAbyss Rising · 023 | Abyss Rising | 023 | Rare | €0.50 |
| Jutte FighterThe Duelist Genesis · 012 | The Duelist Genesis | 012 | Common | €0.19 |
| K9-04 NoroiDoom of Dimensions · 025 | Doom of Dimensions | 025 | Ultra Rare | $3.23 |
| K9-17 IzunaJustice Hunters · 031 | Justice Hunters | 031 | Ultra Rare | $0.59 |
| K9-17 "Ripper"Justice Hunters · 035 | Justice Hunters | 035 | Super Rare | €0.04 |
| K9-66a JokulJustice Hunters · 032 | Justice Hunters | 032 | Super Rare | $0.27 |
| K9-66b LanternJustice Hunters · 033 | Justice Hunters | 033 | Super Rare | $0.25 |
| K9-66X "Jacks"Doom of Dimensions · 047 | Doom of Dimensions | 047 | Super Rare | €0.31 |
| K9-EW Special Release ExperimentJustice Hunters · 041 | Justice Hunters | 041 | New | €0.07 |
| K9-LC Release RestraintJustice Hunters · 038 | Justice Hunters | 038 | Rare | €0.10 |
| K9-ØØ "Hound"Justice Hunters · 036 | Justice Hunters | 036 | Rare | €0.02 |
| K9-ØØ LupisJustice Hunters · 034 | Justice Hunters | 034 | Ultra Rare | €0.28 |
| K9-X Forced ReleaseJustice Hunters · 039 | Justice Hunters | 039 | Super Rare | €0.22 |
| K9-X "Ripper/M"Burst Protocol · 043 | Burst Protocol | 043 | Ultra Rare | €0.67 |
| K9-X "Werewolf"Justice Hunters · 037 | Justice Hunters | 037 | Super Rare | $0.23 |
| KA-2 Des ScissorsAncient Sanctuary · 019 | Ancient Sanctuary | 019 | Short Print | €0.32 |
| KabazaulsPharaonic Guardian · 054 | Pharaonic Guardian | 054 | Common | €0.10 |
| Kabuki DragonWorld Superstars · 049 | World Superstars | 049 | Super Rare | €0.15 |
| Kachi Kochi DragonYu-Gi-Oh! ZEXAL Volume 1 promotional card · 001 | Yu-Gi-Oh! ZEXAL Volume 1 promotional card | 001 | Ultra Rare | €0.26 |
| Kagemucha KnightPremium Collection Tin · 014 | Premium Collection Tin | 014 | Secret Rare | €0.11 |
| Kagemusha of the Blue FlameLegend of Blue Eyes White Dragon · 028 | Legend of Blue Eyes White Dragon | 028 | Common | €0.02 |
| Kagemusha of the Six SamuraiStorm of Ragnarok · 025 | Storm of Ragnarok | 025 | Common | €0.19 |
| Kagemusha Raccoon TokenUnlisted Printings | Unlisted Printings | — | — | — |
| KageningenLegendary Collection 4: Joey's World Mega Pack · 014 | Legendary Collection 4: Joey's World Mega Pack | 014 | Common | $2.03 |
| Kagero the Cannon NinjaDarkwing Blast · 018 | Darkwing Blast | 018 | Common | €0.06 |
| KagetokagePhoton Shockwave · 005 | Photon Shockwave | 005 | Rare | €0.11 |
| Kahkki, Guerilla of Dark WorldStrike of Neos · 018 | Strike of Neos | 018 | Common | €0.08 |
| KahyoreigetsuMaze of Memories · 025 | Maze of Memories | 025 | Rare | €0.07 |
| KaibamanYu-Gi-Oh! 7 Trials to Glory: World Championship Tournament 2005 promotional cards · 002 | Yu-Gi-Oh! 7 Trials to Glory: World Championship Tournament 2005 promotional cards | 002 | Super Rare | €0.10 |
| Kaibaman the LegendDuelist's Advance · 021 | Duelist's Advance | 021 | Secret Rare | €22.94 |
| Kai-Den Kendo SpiritFlames of Destruction · 000 | Flames of Destruction | 000 | Common | €0.02 |
| Kaiju Capture MissionDimension of Chaos · 089 | Dimension of Chaos | 089 | Common | €0.09 |
| Kaiki the Unity StarBattles of Legend: Relentless Revenge · 038 | Battles of Legend: Relentless Revenge | 038 | Ultra Rare | €0.09 |
| Kairo Ryu-Ge EmvaCrossover Breakers · 032 | Crossover Breakers | 032 | Super Rare | €0.12 |
| Kairyu-ShinSpeed Duel: Trials of the Kingdom · 003 | Speed Duel: Trials of the Kingdom | 003 | Common | €0.20 |
| Kairyu-Shin's Dark ReefLegendary Duelists: Duels From the Deep · 022 | Legendary Duelists: Duels From the Deep | 022 | Rare | €0.16 |
| Kaiser ColosseumMagician's Force · 031 | Magician's Force | 031 | Common | €0.42 |