Raw, it’s a $2.19 card. Slabbed as a PSA 10 it sells for 137× that, and PSA has only ever handed out 41 of them.
| August · 1 sale · median $300 · +291% vs Feb | ||||
| 24 | eBay | 2020 POKEMON SWSH BLACK STAR PROMO #070 GROOKEY-HOLO PSA 10 #SWSH070 | +291% | $300.00 |
| February 2025 · 1 sale · median $77 · +91% vs Sep | ||||
| 24 | eBay | Pokemon Grookey Blister Pk. Holo Promo SWSH070 PSA 10 Gem Mint | +91% | $76.66 |
| September 2024 · 1 sale · median $40 · +46% vs Jul | ||||
| 15 | eBay | Pokemon Card PSA 10 Grookey Promo Holo Cosmos Blister SWSH070 2020 | +46% | $40.22 |
| July 2022 · 1 sale · median $28 · +67% vs Jun | ||||
| 12 | eBay | PSA 10 GEM MINT Grookey SWSH070 SWSH Black Star Promo HOLO Pokemon Card CS18-841 | +67% | $27.62 |
| June 2022 · 1 sale · median $17 | ||||
| 22 | eBay | 2020 Pokémon Grookey Black Star Promo Swsh070 PSA 10 Gem Mint #Swsh070 | — | $16.50 |