Opening Furious Fists 3 Pack Blister [Slurpuff] returns about $44.43 in card value against its $230.98 price — roughly $0.19 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in XY - Furious Fists
How expected value is calculated — card value only, from published pull rates and daily market prices.