If it's close to the price of Black Albert, then that seems right - remember, a growler is a little under 2l. or 6 - .33l pulls at the Brick in the Belgium room. $48 for the growler would put it at about $8 a glass(.33l). Brooklyn Lager was about $9, which is about $2.50 a glass (16oz). If/when they carry St. Bernardius, it'll be more than $48...
Remember, they arent distributers, they're retailers - prices are going to be close to shelf prices.