| October · 1 sale · median $7,100 · +177% vs Aug |
| 12 | eBay | 2000 POKEMON GYM CHALLENGE HOLO #5 GIOVANNI'S GYARADOS PSA 10 #5 | +177% | $7,100 |
| August · 1 sale · median $2,562 · −8% vs Jun |
| 10 | Goldin | 2000 Pokemon Gym Challenge Holo #5 Giovanni's Gyarados - PSA GEM MT 10 [Goldin] | −8% | $2,562 |
| June · 1 sale · median $2,799 · +28% vs Apr |
| 16 | eBay | 2000 POKEMON GYM CHALLENGE HOLO #5 GIOVANNI'S GYARADOS PSA 10 #5 | +28% | $2,799 |
| April · 1 sale · median $2,192 · −27% vs Mar |
| 5 | eBay | 2000 POKEMON GYM CHALLENGE HOLO #5 GIOVANNI'S GYARADOS PSA 10 #5 | −27% | $2,192 |
| March · 1 sale · median $2,999 · +114% vs Feb |
| 6 | eBay | 2000 POKEMON GYM CHALLENGE HOLO #5 GIOVANNI'S GYARADOS PSA 10 #5 | +114% | $2,999 |
| February · 1 sale · median $1,400 · +13% vs Jan |
| 26 | eBay | 2000 POKEMON GYM CHALLENGE HOLO #5 GIOVANNI'S GYARADOS PSA 10 #5 | +2% | $1,400 |
| January · 2 sales · median $1,234 · +1% vs Aug |
| 11 | eBay | 2000 Pokemon Unlimited Gym Challenge #5 Giovanni's Gyarados Holo PSA 10 GEM MINT #5 | +24% | $1,369 |
| 2 | eBay | Pokemon Giovanni’s Gyarados #5/132 Gym Challenge Holo Rare PSA 10 POP 68 5/132 | −10% | $1,100 |
| August 2025 · 3 sales · median $1,225 · +75% vs May |
| 25 | eBay | Pokemon Giovanni's Gyarados Gym Challenge Unlimited Holo Rare #5 PSA 10 Gem Mint | −18% | $1,225 |
| 21 | eBay | PSA 10 Giovanni's Gyarados Pokemon Unlimited Gym Challenge Holo Rare #5 Gem Mint #5 | +25% | $1,500 |
| 4 | eBay | Pokemon Giovanni's Gyarados Gym Challenge Unlimited Holo Rare #5 PSA 10 Gem Mint | +72% | $1,202 |
| May 2025 · 1 sale · median $700 · +134% vs Dec |
| 6 | eBay | PSA 10 - 2000 Pokemon Gym Challenge GIOVANNI'S GYARADOS Holo #5 (2621) | +134% | $699.99 |
| December 2024 · 1 sale · median $299 · −20% vs Nov |
| 20 | eBay | Pokémon TCG Giovanni's Gyarados Gym Challenge 5/132 Holo Unlimited Holo PSA 10 5/132 | −20% | $299.00 |
| November 2024 · 1 sale · median $375 · −18% vs Sep |
| 6 | eBay | PSA 10 Giovanni's Gyarados Holo #5/132 Pokemon Gym Challenge Card 5/132 | −18% | $375.00 |
| September 2024 · 1 sale · median $456 · +106% vs Aug |
| 13 | eBay | PSA 10 Giovanni's Gyarados Holo #5/132 Pokemon Gym Challenge Card | +106% | $455.86 |
| August 2024 · 1 sale · median $221 · −32% vs Jul |
| 12 | eBay | 1998 Pokemon japanese Gym Challenge-Set #5 Giovanni's Gyarados HOLO PSA 10 | −32% | $221.41 |
| July 2024 · 1 sale · median $327 · −24% vs Jun |
| 22 | eBay | Pokemon Giovanni's Gyarados Gym Challenge Unlimited Holo Rare #5 PSA 10 Gem Mint | −24% | $327.00 |
| June 2024 · 1 sale · median $433 · +7% vs May |
| 9 | eBay | PSA 10 Giovanni's Gyarados Holo #5/132 Pokemon Gym Challenge Card | +7% | $432.53 |
| May 2024 · 1 sale · median $406 · −6% vs Apr |
| 27 | eBay | PSA 10 GEM Giovanni's Gyarados Gym Challenge Unlimited Holo Pokemon Card 5/132 #5 | −6% | $406.00 |
| April 2024 · 1 sale · median $430 · +34% vs Mar |
| 7 | eBay | 2000 Pokemon Gym Challenge Giovanni's Gyarados Holo 5/132 PSA 10 | +34% | $429.70 |
| March 2024 · 1 sale · median $320 · +2% vs Jan |
| 17 | eBay | 2000 Pokemon Gym Challenge 5/132 Giovanni's Gyarados Holo Gem Mint PSA 10! | −13% | $320.00 |
| January 2024 · 2 sales · median $313 · −31% vs Sep |
| 3 | eBay | 2000 Pokemon Gym Challenge Giovanni's Gyarados Holo #5 - PSA 10 Gem-Mint | +41% | $365.75 |
| 2 | eBay | 2000 Gym Challenge 5 Giovanni's Gyarados Holo Rare Pokemon TCG Card PSA 10 #5 | −43% | $260.00 |
| September 2023 · 1 sale · median $455 · +28% vs Mar |
| 9 | eBay | Pokemon Giovanni's Gyarados Gym Challenge Unlimited Holo PSA 10 GEM MINT #5 #5 | +28% | $455.00 |
| March 2023 · 1 sale · median $355 · +16% vs Oct |
| 5 | eBay | 2000 Pokemon Gym Challenge #5 Giovanni's Gyarados Holo PSA GEM MINT 10 POP 38 | +16% | $354.52 |
| October 2022 · 1 sale · median $305 · −32% vs Sep |
| 6 | eBay | 2000 Pokemon Gym Challenge Giovanni's Gyarados Holo PSA 10 Gem Mt (LOW POP) #5 | −32% | $305.01 |
| September 2022 · 1 sale · median $450 · −6% vs Aug |
| 28 | eBay | 2000 Pokemon Gym Challenge Giovanni's Gyarados Holo PSA 10 Gem Mt #5 | −6% | $450.20 |
| August 2022 · 1 sale · median $480 · +14% vs May |
| 14 | eBay | 2000 Pokemon Gym Challenge #5 Giovanni's Gyarados Holo PSA GEM MINT 10 POP 38 | +14% | $480.16 |
| May 2021 · 1 sale · median $423 |
| 28 | eBay | 2000 Pokemon Gym Challenge Giovanni's Gyarados Holo #5/132 PSA 10 | — | $422.77 |