I've purchased 80 crates, each crate contains 4 items, a grand total of 320 items.
Out of all these items, I have only received one new item which is the Imperial E-1 Enforcer Sniper Rifle, everything else was just previous content from past crates.
This is a ridiculous rate, If i wanted the sniper rifle, I could of just invested 1000 cartel coins for it instead of wasting a good 14700 cartel coins.
My advice is if you're hoping to get lucky and receive one of the new armor sets ( which was my goal ) Don't bother, you're better off waiting, since the drop rate is absurd .