Opening 30th Celebration ex Tin [Greninja ex] (International Version) returns about $36.07 in card value against its $55.65 price — roughly $0.65 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in 30th Celebration
How expected value is calculated — card value only, from published pull rates and daily market prices.
30th Celebration ex Tin [Greninja ex] (International Version) on TCGplayer