Rin and Seri, Inseparable

Rin and Seri, Inseparable

Mythic1 version from Core Set 2021 · all sets

Cheapest version$32.54TCGplayer market price
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Core Set 20212020

Collector Booster 1 in 98 packsany version · 12% per box of 12
VersionPriceCollector Booster
Extended art #278 $32.541 in 98 packs12% per box

"Any version" adds up the chances of each version, so it is a close estimate.