| Siphon InsightInnistrad: Midnight Hunt · 241 | Innistrad: Midnight Hunt | 241 | Rare | €0.18 |
| Siphon InsightInnistrad: Midnight Hunt · 375 | Innistrad: Midnight Hunt | 375 | Rare | $0.59 |
| Siphon InsightBreaking News · 54 | Breaking News | 54 | Rare | €0.16 |
| Siphon InsightOutlaws of Thunder Junction Commander · 242 | Outlaws of Thunder Junction Commander | 242 | Rare | €0.21 |
| Siphon InsightInnistrad: Midnight Hunt Promos · 241p | Innistrad: Midnight Hunt Promos | 241p | Rare | €0.32 |
| Siphon InsightInnistrad: Midnight Hunt Promos · 241s | Innistrad: Midnight Hunt Promos | 241s | Rare | €0.96 |
| Siphon InsightMagic Online Promos · 94066 | Magic Online Promos | 94066 | Rare | — |
| Sire of InsanityDragon's Maze · 104 | Dragon's Maze | 104 | Rare | $0.48 |
| Sire of InsanitySecret Lair Drop Tokens · 275 | Secret Lair Drop Tokens | 275 | Rare | €2.68 |
| Sire of InsanityPioneer Masters · 242 | Pioneer Masters | 242 | Rare | — |
| SisayVanguard Series · 106 | Vanguard Series | 106 | Rare | $1.00 |
| Sisay, Weatherlight CaptainModern Horizons 1 Timeshifts · 6 | Modern Horizons 1 Timeshifts | 6 | Rare | €1.90 |
| Sisay, Weatherlight CaptainModern Horizons · 29 | Modern Horizons | 29 | Rare | €1.60 |
| Sisay, Weatherlight CaptainThe List Tokens · MH1-29 | The List Tokens | MH1-29 | Rare | €1.84 |
| Sisay, Weatherlight CaptainSecret Lair Drop Tokens · 1444 | Secret Lair Drop Tokens | 1444 | Rare | €49.48 |
| Sisay, Weatherlight CaptainSecret Lair Drop Tokens · 9999 | Secret Lair Drop Tokens | 9999 | Rare | €4.97 |
| Sisay, Weatherlight CaptainMagic Online Promos · 91211 | Magic Online Promos | 91211 | Rare | — |
| Sisay, Weatherlight CaptainSecret Lair Drop Tokens · 2778 | Secret Lair Drop Tokens | 2778 | Rare | $6.88 |
| Sisterhood of KarnDoctor Who · 109 | Doctor Who | 109 | Rare | $0.24 |
| Sisterhood of KarnDoctor Who · 399 | Doctor Who | 399 | Rare | €0.30 |
| Sisterhood of KarnDoctor Who · 714 | Doctor Who | 714 | Rare | €0.35 |
| Sisterhood of KarnDoctor Who · 990 | Doctor Who | 990 | Rare | $0.66 |
| Sister HospitallerWarhammer 40,000 Commander · 141 | Warhammer 40,000 Commander | 141 | Rare | $11.17 |
| Sister HospitallerWarhammer 40,000 Commander · 141★ | Warhammer 40,000 Commander | 141★ | Rare | $23.59 |
| Sister of SilenceWarhammer 40,000 Commander · 26 | Warhammer 40,000 Commander | 26 | Rare | $0.41 |
| Sister of SilenceWarhammer 40,000 Commander · 26★ | Warhammer 40,000 Commander | 26★ | Rare | $4.81 |
| Sister RepentiaWarhammer 40,000 Commander · 142 | Warhammer 40,000 Commander | 142 | Rare | $0.35 |
| Sister RepentiaWarhammer 40,000 Commander · 142★ | Warhammer 40,000 Commander | 142★ | Rare | $1.30 |
| Sisters of Stone DeathGRN Guild Kit · 71 | GRN Guild Kit | 71 | Rare | €0.47 |
| Sisters of Stone DeathRavnica: City of Guilds · 231 | Ravnica: City of Guilds | 231 | Rare | €0.49 |
| Sisters of Stone Death AvatarMagic Online Avatars · 55 | Magic Online Avatars | 55 | Rare | — |
| Sita Varma, Masked RacerAetherdrift · 223 | Aetherdrift | 223 | Rare | €0.07 |
| Sita Varma, Masked RacerAetherdrift · 368 | Aetherdrift | 368 | Rare | €0.17 |
| Sita Varma, Masked RacerAetherdrift · 493 | Aetherdrift | 493 | Rare | €0.54 |
| Sita Varma, Masked RacerAetherdrift Promos · 223p | Aetherdrift Promos | 223p | Rare | €0.16 |
| Sita Varma, Masked RacerAetherdrift Promos · 223s | Aetherdrift Promos | 223s | Rare | $0.14 |
| Sivvi's ValorNemesis · 22 | Nemesis | 22 | Rare | €0.36 |
| SixModern Horizons 3 · 169 | Modern Horizons 3 | 169 | Rare | €5.00 |
| SixModern Horizons 3 · 370 | Modern Horizons 3 | 370 | Rare | €10.25 |
| SixModern Horizons 3 · 430 | Modern Horizons 3 | 430 | Rare | $6.12 |
| SixModern Horizons 3 · 484 | Modern Horizons 3 | 484 | Rare | €6.52 |
| SixModern Horizons 3 Promos · 169p | Modern Horizons 3 Promos | 169p | Rare | $5.11 |
| SixModern Horizons 3 Promos · 169s | Modern Horizons 3 Promos | 169s | Rare | €7.66 |
| SixSecret Lair Drop Tokens · 2660 | Secret Lair Drop Tokens | 2660 | Rare | €16.35 |
| SixThe List Tokens · MH3-169 | The List Tokens | MH3-169 | Rare | — |
| Sixth Stage of Magic DesignUnknown Event · RW03h | Unknown Event | RW03h | Rare | $11.99 |
| Skalla WolfCore Set 2019 · 303 | Core Set 2019 | 303 | Rare | €0.47 |
| Skarrgan FirebirdDuel Decks: Heroes vs. Monsters · 57 | Duel Decks: Heroes vs. Monsters | 57 | Rare | €0.19 |
| Skarrgan FirebirdRNA Guild Kit · 81 | RNA Guild Kit | 81 | Rare | €0.17 |
| Skarrgan FirebirdGuildpact · 77 | Guildpact | 77 | Rare | €0.17 |