I just opened up 100 lockers in a row and here are the results:
Blue/Common 165 items or 55% of all items received
Purple/Uncommon 108 items or 36% of all items received
Pink/Rare 24 items or 8% of all items received
Red/Exotic 3 items or 1% of all items received
Yellow/Mythic 0 or 0% of all items received
Of those 300 items, only 44 were new, the other 256 were duplicates so 85% duplicates. Save your time and buy what you want.
Honorable mention - I havent actually had a Mythic since the game dropped.

