Opening Prismatic Evolutions Tech Sticker Collection [Leafeon] returns about $17.25 in card value against its $41.50 price — roughly $0.42 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in Prismatic Evolutions
How expected value is calculated — card value only, from published pull rates and daily market prices.
Prismatic Evolutions Tech Sticker Collection [Leafeon] on TCGplayer