Opening Brilliant Stars Pokemon Center Elite Trainer Box (Exclusive) returns about $60.45 in card value against its $227.68 price — roughly $0.27 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in Brilliant Stars
How expected value is calculated — card value only, from published pull rates and daily market prices.
Brilliant Stars Pokemon Center Elite Trainer Box (Exclusive) on TCGplayer