Opening Pokemon GO Pokemon Center Elite Trainer Box Plus (Exclusive) returns about $57.62 in card value against its $235.31 price — roughly $0.24 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in Pokemon GO
How expected value is calculated — card value only, from published pull rates and daily market prices.
Pokemon GO Pokemon Center Elite Trainer Box Plus (Exclusive) on TCGplayer