 Gengar - SWSH241 (Prerelease) (Staff) #SWSH241Sword & Shield Promo Cards · Holofoil · 2019 | $2,200 | $3,025 | $11,000 |
 Gengar & Mimikyu GX (Alternate Full Art) #165/181SM - Team Up · Holofoil · 2019 | $2,020 | $2,556 | $7,945 |
 Gengar #011/110Legendary Collection · Reverse Holofoil · 2002 | $1,800 | $8,298 | $207,679 |
 Gengar ex #108/112EX FireRed & LeafGreen · Holofoil · 2004 | $1,400 | $10,645 | $43,076 |
 Dark Gengar #006/105Neo Destiny · Unlimited Holofoil · 2002 | $1,103 | $1,757 | $10,000 |
 Gengar VMAX (Alternate Art Secret) #271/264Fusion Strike · Holofoil · 2021 | $1,023 | $900 | $2,250 |
 Gengar (Library Exclusive) #085/202Miscellaneous Cards & Products · Holofoil · 2026 | $980 | — | — |
 Mega Gengar ex #284/217Ascended Heroes · Holofoil · 2026 | $876 | $968 | $1,950 |
 Gengar (13) #013/165Expedition · Reverse Holofoil · 2002 | $800 | $981 | $8,139 |
 Gengar EX (114 Full Art) #114/119XY - Phantom Forces · Holofoil · 2014 | $768 | $3,404 | $26,587 |
| Dark Gengar #006/105Neo Destiny · 1st Edition Holofoil · 2002 | $750 | $4,501 | $31,050 |
| Gengar (13) #013/165Expedition · Holofoil · 2002 | $717 | $3,746 | $33,890 |
 Gengar (Prime) #94/102Triumphant · Holofoil · 2010 | $569 | $3,980 | $14,400 |
 Sabrina's Gengar #014/132Gym Heroes · 1st Edition Holofoil · 2000 | $550 | $4,166 | $29,100 |
 M Gengar EX (121 Secret Rare) #121/119XY - Phantom Forces · Holofoil · 2014 | $528 | $1,354 | $9,201 |
 Gengar (10) #010/144Skyridge · Normal · 2003 | $510 | $796 | $5,965 |
 Gengar & Mimikyu GX (Secret) #186/181SM - Team Up · Holofoil · 2019 | $506 | $608 | $2,346 |
| Sabrina's Gengar #014/132Gym Heroes · Unlimited Holofoil · 2000 | $483 | $1,525 | $15,553 |
 Sabrina's Gengar #029/132Gym Challenge · 1st Edition · 2000 | $464 | $1,300 | $5,626 |
 Gengar (5) #05/62Fossil · 1st Edition Holofoil · 1999 | $458 | $2,471 | $24,501 |
 Gengar Lv.X #97/99Arceus · Holofoil · 2009 | $429 | $2,494 | $23,697 |
 Gengar V #156/264Prize Pack Series Cards · Holofoil · 2022 | $397 | — | — |
 Gengar & Mimikyu GX #53/181SM - Team Up · Holofoil · 2019 | $386 | $528 | $2,873 |
 Gengar & Mimikyu GX (Full Art) #164/181SM - Team Up · Holofoil · 2019 | $383 | $475 | $1,783 |
 Gengar (48) #048/165Expedition · Reverse Holofoil · 2002 | $313 | $1,300 | $6,947 |
| Gengar #011/110Legendary Collection · Holofoil · 2002 | $290 | — | — |
 M Gengar EX #XY166XY Promos · Holofoil · 2013 | $284 | — | — |
 Gengar #18/100Stormfront · Reverse Holofoil · 2008 | $231 | — | — |
 Gengar #5/92EX Legend Maker · Reverse Holofoil · 2006 | $225 | — | — |
| Gengar (5) #05/62Fossil · Unlimited Holofoil · 1999 | $217 | $750 | $3,284 |
| Sabrina's Gengar #029/132Gym Challenge · Unlimited · 2000 | $215 | $475 | $3,700 |
 Gengar #27/130Diamond and Pearl · Reverse Holofoil · 2007 | $200 | — | — |
 Gengar (16) #16/99Arceus · Reverse Holofoil · 2009 | $186 | — | — |
| Gengar (48) #048/165Expedition · Normal · 2002 | $182 | $367 | $2,240 |
 Gengar (Cosmos Holo) (EB Games Exclusive) #050/088Miscellaneous Cards & Products · Holofoil · 2026 | $177 | — | — |
| Gengar #5/92EX Legend Maker · Holofoil · 2006 | $170 | — | — |
 M Gengar EX #35/119XY - Phantom Forces · Holofoil · 2014 | $158 | $358 | $3,094 |
 Gengar ex #154/12830th Celebration · Holofoil · 2026 | $128 | — | — |
 Gengar #SWSH052Sword & Shield Promo Cards · Holofoil · 2019 | $126 | — | — |
 Gengar (20) #20/62Fossil · 1st Edition · 1999 | $109 | $410 | $2,918 |
 Gengar (Cosmos Holo) (Gamestop Exclusive) #050/088Miscellaneous Cards & Products · Holofoil · 2026 | $97.32 | — | — |
 Gengar (Prime) #94/10230th Celebration Classic Collection · Holofoil · 2026 | $95.20 | $130 | $496 |
 Gengar (17) #17/99Arceus · Normal · 2009 | $85.60 | — | — |
| Gengar #27/130Diamond and Pearl · Normal · 2007 | $84.25 | — | — |
| Gengar (17) #17/99Arceus · Reverse Holofoil · 2009 | $84.20 | $499 | $1,743 |
 Gengar EX #34/119XY - Phantom Forces · Holofoil · 2014 | $84.08 | $183 | $755 |
 Gengar GL #40/111Rising Rivals · Reverse Holofoil · 2009 | $77.89 | $239 | $976 |
 Gengar Spirit Link - 95/119 (Alternate Holo) (Gamestop Exclusive) #095/119Miscellaneous Cards & Products · Holofoil · 2026 | $63.25 | — | — |
| Gengar #18/100Stormfront · Normal · 2008 | $61.67 | $201 | $350 |
 Gengar - 60/162 (Cosmos Holo) #060/162Miscellaneous Cards & Products · Holofoil · 2026 | $57.73 | — | — |
 Mega Gengar ex #056/094Prize Pack Series Cards · Holofoil · 2022 | $57.38 | — | — |
 Gengar #35/83Generations · Reverse Holofoil · 2016 | $57.22 | — | — |
 Gengar ex #193/162Temporal Forces · Holofoil · 2024 | $54.38 | $70.00 | $354 |
 Gengar #TG06/TG30Lost Origin Trainer Gallery · Holofoil · 2022 | $52.07 | $85.00 | $605 |
 Gengar #70/214SM - Unbroken Bonds · Reverse Holofoil · 2019 | $50.07 | $171 | $890 |
| Gengar (20) #20/62Fossil · Unlimited · 1999 | $46.92 | — | — |
 Gengar #60/162XY - BREAKthrough · Reverse Holofoil · 2015 | $45.80 | $344 | $2,878 |
| Gengar (16) #16/99Arceus · Normal · 2009 | $43.98 | — | — |
| Gengar #35/83Generations · Holofoil · 2016 | $43.52 | — | — |
 Gengar VMAX #157/264Fusion Strike · Holofoil · 2021 | $43.43 | — | — |
 Mega Gengar ex #269/217Ascended Heroes · Holofoil · 2026 | $41.51 | $55.00 | $181 |
| Gengar #60/162XY - BREAKthrough · Holofoil · 2015 | $41.49 | — | — |
 Gengar - 2009 (Jason Martinez) #18/100World Championship Decks · Normal · 2018 | $37.21 | — | — |
| Gengar GL #40/111Rising Rivals · Normal · 2009 | $31.77 | $226 | $1,925 |
 Gengar - SWSH241 (Prerelease) #SWSH241Sword & Shield Promo Cards · Holofoil · 2019 | $27.66 | — | — |
 Gengar #38/111SM - Crimson Invasion · Holofoil · 2017 | $26.14 | — | — |
| Gengar #38/111SM - Crimson Invasion · Reverse Holofoil · 2017 | $26.12 | — | — |
 Gengar - 60/162 (XY BREAKthrough) #060/162Deck Exclusives · Normal · 2016 | $24.81 | — | — |
 Gengar 094/165 (Cosmos Holo) #094/165Miscellaneous Cards & Products · Holofoil · 2026 | $24.18 | — | — |
| Gengar #70/214SM - Unbroken Bonds · Normal · 2019 | $23.98 | — | — |
 Gengar EX - 34/119 #034/119Jumbo Cards · Holofoil · 2015 | $23.30 | — | — |
 Gengar - 38/111 (Prerelease Kit Exclusive) #038/111Deck Exclusives · Normal · 2016 | $22.53 | — | — |
 Gengar Spirit Link #95/119XY - Phantom Forces · Reverse Holofoil · 2014 | $22.03 | $74.30 | $199 |
 Gengar #066/196Prize Pack Series Cards · Normal · 2022 | $21.34 | — | — |
 Gengar #085/202Sword & Shield Base Set · Reverse Holofoil · 2020 | $11.54 | — | — |
 Gengar V #156/264Fusion Strike · Holofoil · 2021 | $9.58 | — | — |
 Gengar #094/165Scarlet & Violet 151 · Reverse Holofoil · 2023 | $8.89 | — | — |
 Gengar ex #104/162Temporal Forces · Holofoil · 2024 | $7.27 | $34.07 | $194 |
| Gengar #085/202Sword & Shield Base Set · Holofoil · 2020 | $7.09 | — | — |
 Gengar - 050/088 (Cosmos Holo) #050/088Blister Exclusives · Holofoil · 2026 | $6.02 | — | — |
 Gengar #050/088Prize Pack Series Cards · Normal · 2022 | $5.68 | — | — |
 Gengar #066/196Lost Origin · Reverse Holofoil · 2022 | $5.34 | $44.13 | $147 |
| Gengar Spirit Link #95/119XY - Phantom Forces · Normal · 2014 | $5.08 | — | — |
 Gengar #057/198Chilling Reign · Reverse Holofoil · 2021 | $4.02 | — | — |
| Gengar #057/198Chilling Reign · Holofoil · 2021 | $3.96 | — | — |
 Mega Gengar ex #073Mega Evolution Promo · Holofoil · 2025 | $3.94 | — | — |
 Gengar ex #090/12830th Celebration · Holofoil · 2026 | $3.91 | $16.40 | $54.90 |
| Gengar #066/196Lost Origin · Holofoil · 2022 | $3.84 | — | — |
 Gengar (Cosmos Holo) #057/091Trick or Trade BOOster Bundle 2024 · Holofoil · 2024 | $3.58 | — | — |
| Gengar #094/165Scarlet & Violet 151 · Holofoil · 2023 | $3.30 | — | — |
 Gengar #066/196Deck Exclusives · Normal · 2016 | $3.12 | — | — |
 Mega Gengar ex #125/217Ascended Heroes · Holofoil · 2026 | $2.95 | $19.31 | $67.75 |
 Mega Gengar ex #056/094Phantasmal Flames · Holofoil · 2025 | $2.39 | — | — |
 Gengar #057/091Paldean Fates · Reverse Holofoil · 2024 | $2.19 | — | — |
 Gengar (2021 Copyright Date) #057/198Trick or Trade BOOster Bundle · Holofoil · 2022 | $1.42 | — | — |
 Gengar (2022 Copyright Date) #066/196Trick or Trade BOOster Bundle 2023 · Holofoil · 2023 | $1.13 | — | — |
 Gengar #050/088Perfect Order · Reverse Holofoil · 2026 | $0.92 | — | — |
| Gengar #050/088Perfect Order · Holofoil · 2026 | $0.63 | — | — |
| Gengar #057/091Paldean Fates · Normal · 2024 | $0.36 | $22.08 | $113 |