A medium flat rate box will hold 4 550-ct boxes for a fast economical. I don't know about Blowout for FB/BKB, but I do know they are giving good money and even better store credit for BB. It's to the point where if I can aquire a qualifying BB GU/Auto for $1.50 DLVD, I would pull the trigger on the spot. I did this a year to two back. I aquired enough credit for 3 boxes of Triple Threads and 3 boxes of Absolute 
.
.
