 Slowking #14/18Southern Islands · Reverse Holofoil · 2001 | $331 | — | — |
 Slowking #014/111Neo Genesis · 1st Edition Holofoil · 2000 | $227 | $1,492 | $53,204 |
 Dark Slowking #020/105Neo Destiny · 1st Edition · 2002 | $140 | $262 | $1,833 |
 Dark Slowking #9/109EX Team Rocket Returns · Holofoil · 2004 | $118 | $286 | $1,813 |
| Dark Slowking #9/109EX Team Rocket Returns · Reverse Holofoil · 2004 | $118 | $935 | $4,421 |
 Galarian Slowking V (Alternate Full Art) #179/198Chilling Reign · Holofoil · 2021 | $115 | $106 | $293 |
 Slowking #14/115EX Unseen Forces · Reverse Holofoil · 2005 | $83.99 | $379 | $4,300 |
 Slowking #034/147Aquapolis · Reverse Holofoil · 2003 | $80.33 | $375 | $2,403 |
| Slowking #014/111Neo Genesis · Unlimited Holofoil · 2000 | $79.96 | $310 | $5,174 |
| Slowking #14/115EX Unseen Forces · Holofoil · 2005 | $78.65 | $245 | $943 |
 Slowking #28/113EX Delta Species · Reverse Holofoil · 2005 | $69.33 | $357 | $2,750 |
 Slowking (Prime) #85/90Undaunted · Holofoil · 2010 | $68.79 | — | — |
| Dark Slowking #9/109EX Team Rocket Returns · Normal · 2004 | $47.00 | $286 | $1,813 |
 Slowking #12/123HeartGold SoulSilver · Holofoil · 2010 | $45.73 | $72.41 | $233 |
| Dark Slowking #020/105Neo Destiny · Unlimited · 2002 | $43.78 | $166 | $199 |
| Slowking #12/123HeartGold SoulSilver · Reverse Holofoil · 2010 | $38.77 | $110 | $286 |
| Slowking #034/147Aquapolis · Normal · 2003 | $36.21 | $50.25 | $299 |
 Slowking #28/106Great Encounters · Reverse Holofoil · 2008 | $23.65 | — | — |
 Slowking #32/95Call of Legends · Reverse Holofoil · 2011 | $22.75 | $114 | $211 |
 Slowking - 21/122 (Cosmos Holo) #021/122Alternate Art Promos · Holofoil · 2026 | $12.61 | — | — |
 Galarian Slowking VMAX (Secret) #207/198Chilling Reign · Holofoil · 2021 | $12.44 | — | — |
 Slowking ex #238/193Paldea Evolved · Holofoil · 2023 | $9.71 | $22.66 | $138 |
 Slowking #55/214SM - Lost Thunder · Reverse Holofoil · 2018 | $9.19 | $37.78 | $76.57 |
 Slowking #49/108Dark Explorers · Reverse Holofoil · 2012 | $7.65 | $50.00 | $168 |
| Slowking #28/113EX Delta Species · Normal · 2005 | $6.56 | — | — |
| Slowking #49/108Dark Explorers · Normal · 2012 | $5.89 | $29.99 | $101 |
 Galarian Slowking V (Full Art) #178/198Chilling Reign · Holofoil · 2021 | $5.15 | $41.00 | $49.52 |
| Slowking #32/95Call of Legends · Normal · 2011 | $5.06 | — | — |
 Galarian Slowking (Cosmos Holo) #098/198Miscellaneous Cards & Products · Holofoil · 2026 | $3.72 | — | — |
| Slowking #28/106Great Encounters · Normal · 2008 | $3.66 | — | — |
| Slowking #55/214SM - Lost Thunder · Normal · 2018 | $3.03 | $18.94 | $45.00 |
 Galarian Slowking VMAX #100/198Chilling Reign · Holofoil · 2021 | $1.78 | $8.45 | $45.00 |
 Slowking #21/122XY - BREAKpoint · Reverse Holofoil · 2016 | $1.46 | — | — |
| Slowking #21/122XY - BREAKpoint · Holofoil · 2016 | $1.23 | — | — |
 Galarian Slowking V #099/198Chilling Reign · Holofoil · 2021 | $1.20 | $17.95 | $50.45 |
 Slowking - 21/122 (XY BREAKpoint) #021/122Deck Exclusives · Normal · 2016 | $1.17 | — | — |
 Slowking #48/147SM - Burning Shadows · Reverse Holofoil · 2017 | $1.15 | $22.50 | $37.86 |
 Slowking ex #086/193Paldea Evolved · Holofoil · 2023 | $1.07 | $11.00 | $41.85 |
 Galarian Slowking #098/198Chilling Reign · Reverse Holofoil · 2021 | $0.78 | $12.57 | $34.47 |
 Slowking #058/142Stellar Crown · Reverse Holofoil · 2024 | $0.64 | $18.00 | $45.50 |
| Slowking #48/147SM - Burning Shadows · Normal · 2017 | $0.56 | $25.00 | $35.78 |
| Galarian Slowking #098/198Chilling Reign · Holofoil · 2021 | $0.52 | $12.53 | $34.25 |
| Slowking #058/142Stellar Crown · Normal · 2024 | $0.27 | $11.58 | $15.99 |
 Slowking #019/131Prismatic Evolutions · Reverse Holofoil · 2025 | $0.24 | $15.00 | $84.44 |
| Slowking #019/131Prismatic Evolutions · Normal · 2025 | $0.12 | — | — |