 Gengar #011/110Legendary Collection · Reverse Holofoil · 2002 | $2,225 | $19,275 | $207,679 |
 Gengar - SWSH241 (Prerelease) (Staff) #SWSH241Sword & Shield Promo Cards · Holofoil · 2019 | $2,200 | $2,420 | $14,000 |
 Gengar & Mimikyu GX (Alternate Full Art) #165/181SM - Team Up · Holofoil · 2019 | $2,187 | $2,600 | $6,800 |
 Gengar ex #108/112EX FireRed & LeafGreen · Holofoil · 2004 | $1,400 | $9,915 | $91,951 |
 Sabrina's Gengar #014/132Gym Heroes · 1st Edition Holofoil · 2000 | $1,250 | $7,209 | $64,867 |
 Dark Gengar #006/105Neo Destiny · Unlimited Holofoil · 2002 | $1,064 | $1,981 | $17,118 |
 Gengar VMAX (Alternate Art Secret) #271/264Fusion Strike · Holofoil · 2021 | $1,010 | $883 | $2,125 |
 Gengar (Library Exclusive) #085/202Miscellaneous Cards & Products · Holofoil · 2026 | $880 | — | — |
 Gengar EX (114 Full Art) #114/119XY - Phantom Forces · Holofoil · 2014 | $822 | $4,400 | $29,594 |
| Dark Gengar #006/105Neo Destiny · 1st Edition Holofoil · 2002 | $750 | $5,088 | $37,848 |
 Gengar Lv.X #97/99Arceus · Holofoil · 2009 | $743 | $7,461 | $23,590 |
 Gengar (5) #05/62Fossil · 1st Edition Holofoil · 1999 | $725 | $3,550 | $41,500 |
 Gengar (10) #010/144Skyridge · Normal · 2003 | $687 | $1,325 | $6,300 |
 Sabrina's Gengar #029/132Gym Challenge · 1st Edition · 2000 | $670 | $1,525 | $13,500 |
 Gengar (13) #013/165Expedition · Holofoil · 2002 | $650 | $6,876 | $33,755 |
 Gengar (Prime) #94/102Triumphant · Holofoil · 2010 | $624 | $4,737 | $31,384 |
 Mega Gengar ex #284/217Ascended Heroes · Holofoil · 2026 | $614 | $817 | $1,350 |
| Gengar (13) #013/165Expedition · Reverse Holofoil · 2002 | $600 | $5,611 | $12,184 |
 Gengar & Mimikyu GX (Secret) #186/181SM - Team Up · Holofoil · 2019 | $561 | $705 | $2,475 |
| Sabrina's Gengar #014/132Gym Heroes · Unlimited Holofoil · 2000 | $519 | $1,442 | $17,993 |
 M Gengar EX (121 Secret Rare) #121/119XY - Phantom Forces · Holofoil · 2014 | $502 | $1,365 | $9,076 |
 Gengar V #156/264Prize Pack Series Cards · Holofoil · 2022 | $438 | — | — |
 Gengar & Mimikyu GX (Full Art) #164/181SM - Team Up · Holofoil · 2019 | $421 | $486 | $1,850 |
 Gengar & Mimikyu GX #53/181SM - Team Up · Holofoil · 2019 | $391 | $500 | $2,600 |
 Gengar #27/130Diamond and Pearl · Reverse Holofoil · 2007 | $364 | $2,621 | $2,640 |
 Gengar (48) #048/165Expedition · Reverse Holofoil · 2002 | $313 | $3,115 | $8,919 |
 M Gengar EX #XY166XY Promos · Holofoil · 2013 | $303 | — | — |
 Gengar (17) #17/99Arceus · Reverse Holofoil · 2009 | $300 | $2,352 | $4,329 |
 Gengar #18/100Stormfront · Reverse Holofoil · 2008 | $293 | — | — |
| Gengar #011/110Legendary Collection · Holofoil · 2002 | $290 | — | — |
 Gengar #5/92EX Legend Maker · Reverse Holofoil · 2006 | $250 | — | — |
 Gengar (16) #16/99Arceus · Reverse Holofoil · 2009 | $233 | — | — |
| Gengar (5) #05/62Fossil · Unlimited Holofoil · 1999 | $219 | $437 | $3,382 |
| Sabrina's Gengar #029/132Gym Challenge · Unlimited · 2000 | $213 | $750 | $4,910 |
| Gengar #5/92EX Legend Maker · Holofoil · 2006 | $198 | — | — |
| Gengar (48) #048/165Expedition · Normal · 2002 | $192 | $572 | $2,700 |
 Gengar (Cosmos Holo) (EB Games Exclusive) #050/088Miscellaneous Cards & Products · Holofoil · 2026 | $170 | — | — |
 M Gengar EX #35/119XY - Phantom Forces · Holofoil · 2014 | $152 | — | — |
 Gengar #SWSH052Sword & Shield Promo Cards · Holofoil · 2019 | $132 | — | — |
 Gengar (20) #20/62Fossil · 1st Edition · 1999 | $120 | $612 | $3,581 |
| Gengar (17) #17/99Arceus · Normal · 2009 | $99.83 | — | — |
 Gengar GL #40/111Rising Rivals · Reverse Holofoil · 2009 | $88.48 | $1,000 | $1,338 |
| Gengar #27/130Diamond and Pearl · Normal · 2007 | $86.28 | $987 | $7,499 |
 Gengar EX #34/119XY - Phantom Forces · Holofoil · 2014 | $84.21 | $290 | $1,202 |
 Gengar (Cosmos Holo) (Gamestop Exclusive) #050/088Miscellaneous Cards & Products · Holofoil · 2026 | $72.44 | — | — |
| Gengar #18/100Stormfront · Normal · 2008 | $69.71 | $297 | $350 |
 Gengar #70/214SM - Unbroken Bonds · Reverse Holofoil · 2019 | $66.57 | — | — |
 Gengar #60/162XY - BREAKthrough · Reverse Holofoil · 2015 | $65.69 | — | — |
 Gengar - 60/162 (Cosmos Holo) #060/162Miscellaneous Cards & Products · Holofoil · 2026 | $65.67 | — | — |
 Gengar Spirit Link - 95/119 (Alternate Holo) (Gamestop Exclusive) #095/119Miscellaneous Cards & Products · Holofoil · 2026 | $63.04 | — | — |
 Gengar #35/83Generations · Reverse Holofoil · 2016 | $56.78 | — | — |
 Gengar ex #154/12830th Celebration · Holofoil · 2026 | $51.11 | $151 | $764 |
 Gengar ex #193/162Temporal Forces · Holofoil · 2024 | $50.09 | $71.00 | $375 |
| Gengar #60/162XY - BREAKthrough · Holofoil · 2015 | $47.50 | — | — |
| Gengar (16) #16/99Arceus · Normal · 2009 | $46.75 | — | — |
 Gengar #TG06/TG30Lost Origin Trainer Gallery · Holofoil · 2022 | $46.24 | — | — |
| Gengar (20) #20/62Fossil · Unlimited · 1999 | $46.17 | — | — |
| Gengar #35/83Generations · Holofoil · 2016 | $45.04 | — | — |
 Gengar (Prime) #94/10230th Celebration Classic Collection · Holofoil · 2026 | $44.63 | $186 | $775 |
 Mega Gengar ex #056/094Prize Pack Series Cards · Holofoil · 2022 | $40.20 | — | — |
 Gengar VMAX #157/264Fusion Strike · Holofoil · 2021 | $39.51 | — | — |
| Gengar GL #40/111Rising Rivals · Normal · 2009 | $38.32 | $239 | $968 |
 Gengar - 2009 (Jason Martinez) #18/100World Championship Decks · Normal · 2018 | $38.12 | — | — |
 Gengar Spirit Link #95/119XY - Phantom Forces · Reverse Holofoil · 2014 | $32.41 | $74.30 | $202 |
 Gengar - 60/162 (XY BREAKthrough) #060/162Deck Exclusives · Normal · 2016 | $31.27 | — | — |
 Mega Gengar ex #269/217Ascended Heroes · Holofoil · 2026 | $31.13 | $40.78 | $131 |
 Gengar #38/111SM - Crimson Invasion · Reverse Holofoil · 2017 | $29.65 | — | — |
| Gengar #38/111SM - Crimson Invasion · Holofoil · 2017 | $28.64 | — | — |
 Gengar - SWSH241 (Prerelease) #SWSH241Sword & Shield Promo Cards · Holofoil · 2019 | $27.99 | — | — |
 Gengar EX - 34/119 #034/119Jumbo Cards · Holofoil · 2015 | $23.83 | — | — |
 Gengar - 38/111 (Prerelease Kit Exclusive) #038/111Deck Exclusives · Normal · 2016 | $23.34 | — | — |
 Gengar #066/196Prize Pack Series Cards · Normal · 2022 | $23.11 | — | — |
| Gengar #70/214SM - Unbroken Bonds · Normal · 2019 | $21.63 | $185 | $679 |
 Gengar 094/165 (Cosmos Holo) #094/165Miscellaneous Cards & Products · Holofoil · 2026 | $17.71 | — | — |
 Gengar V #156/264Fusion Strike · Holofoil · 2021 | $12.62 | — | — |
 Gengar #094/165Scarlet & Violet 151 · Reverse Holofoil · 2023 | $10.88 | — | — |
 Gengar #085/202Sword & Shield Base Set · Reverse Holofoil · 2020 | $10.62 | — | — |
| Gengar #085/202Sword & Shield Base Set · Holofoil · 2020 | $9.15 | — | — |
 Gengar ex #104/162Temporal Forces · Holofoil · 2024 | $7.30 | $38.56 | $237 |
 Gengar - 050/088 (Cosmos Holo) #050/088Blister Exclusives · Holofoil · 2026 | $6.14 | — | — |
| Gengar Spirit Link #95/119XY - Phantom Forces · Normal · 2014 | $5.51 | — | — |
 Gengar #066/196Lost Origin · Reverse Holofoil · 2022 | $5.33 | — | — |
 Gengar #050/088Prize Pack Series Cards · Normal · 2022 | $4.91 | — | — |
 Gengar #057/198Chilling Reign · Reverse Holofoil · 2021 | $4.49 | — | — |
| Gengar #066/196Lost Origin · Holofoil · 2022 | $4.38 | — | — |
| Gengar #057/198Chilling Reign · Holofoil · 2021 | $4.01 | — | — |
 Gengar (Cosmos Holo) #057/091Trick or Trade BOOster Bundle 2024 · Holofoil · 2024 | $3.63 | — | — |
| Gengar #094/165Scarlet & Violet 151 · Holofoil · 2023 | $3.51 | — | — |
 Gengar #066/196Deck Exclusives · Normal · 2016 | $3.08 | — | — |
 Mega Gengar ex #073Mega Evolution Promo · Holofoil · 2025 | $2.88 | — | — |
 Mega Gengar ex #125/217Ascended Heroes · Holofoil · 2026 | $2.45 | $18.96 | $63.51 |
 Mega Gengar ex #056/094Phantasmal Flames · Holofoil · 2025 | $1.96 | — | — |
 Gengar (2021 Copyright Date) #057/198Trick or Trade BOOster Bundle · Holofoil · 2022 | $1.95 | — | — |
 Gengar #057/091Paldean Fates · Reverse Holofoil · 2024 | $1.79 | — | — |
 Gengar ex #090/12830th Celebration · Holofoil · 2026 | $0.89 | $11.00 | $43.52 |
 Gengar #050/088Perfect Order · Reverse Holofoil · 2026 | $0.77 | — | — |
 Gengar (2022 Copyright Date) #066/196Trick or Trade BOOster Bundle 2023 · Holofoil · 2023 | $0.71 | — | — |
| Gengar #050/088Perfect Order · Holofoil · 2026 | $0.46 | — | — |
| Gengar #057/091Paldean Fates · Normal · 2024 | $0.33 | $19.66 | $142 |