Besides the obvious argument "it'd break the game!" Why not? I'm not saying sell primary/special/heavy specific engrams. Just sell a universal 'weapon' engram. There are plenty different kinds to get so it's not like a yallarhorn/red death/thunderlord is guaranteed. Also, for those who would say that it wouldn't be 'earned' how is it any different from buying 4 chest engrams trying to get HPF or a helmet one trying to buy a helm of saint 14? Thoughts?