Opening Destined Rivals Premium Checklane Blister [Gastrodon] returns about $4.24 in card value against its $18.61 price — roughly $0.23 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in Destined Rivals
How expected value is calculated — card value only, from published pull rates and daily market prices.
Destined Rivals Premium Checklane Blister [Gastrodon] on TCGplayer