Brainstorm

Common2 versions from Eternal Masters · all sets

Cheapest version$1.91TCGplayer market price

Eternal Masters2016

Draft Booster 1 in 25 packsany version · 62% per box of 24

VersionPriceDraft Booster

Regular #40 $1.911 in 27 packs60% per box

Foil #40 $2.951 in 373 packs6.2% per box

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