Quoted from dmesserly:Not a comment on relative $ value but I wouldn't do it on play value. MB and SS are much better combined than BBB. Not as rare though. IMO of course.
^^^this. And that's coming from a BBB owner. BBB's a little flashier and prettier, but it can't hold a candle to the playability of either MB or SS. The rareness and crazy artwork is what makes BBB so valuable.