Raw, it’s a $4.50 card. Slabbed as a PSA 10 it sells for 8.9× that, and PSA has only ever handed out 256 of them.
| June · 1 sale · median $40 · +33% vs Jan | |||||
| 4 | eBay | 2021 POKEMON JAPANESE S PROMO #171 FULL ART/RILLABOOM VMAX PSA 10 #171 | +33% | $40 | |
| January 2025 · 1 sale · median $30 · +216% vs May | |||||
| 5 | eBay | Rillaboom VMAX Pokemon 2021 Holo Start Dash Camp. Promo Japanese 171/S-P PSA 10 #171 | +216% | $30 | |
| May 2024 · 1 sale · median $10 · −41% vs Nov | |||||
| 30 | eBay | Rillaboom VMAX Pokemon 2021 Holo Start Dash Camp. Promo Japanese 171/S-P PSA 10 #171 | −41% | $10 | |
| November 2023 · 1 sale · median $16 · −54% vs Oct | |||||
| 28 | eBay | PSA 10 GEM MINT - Rillaboom VMAX 171/S-P Gigantamax Promo Pokemon Japanese | −54% | $16 | |
| October 2023 · 1 sale · median $35 | |||||
| 4 | eBay | PSA 10 Rillaboom VMAX 171/S-P RENGEKI s5R Promo Holo Japanese Pokemon Card Low P 171/S-P | — | $35 | |