i opened like 8 crates and didnt get something worthy .
the most expensive weaphons that i got was p250 | mehndi for 1.5 $
other weaphons that i recieved was 0.09 $
i recommend not open this cases.
hope i helped you .

 

Well yeah opening cases is usually a waste of time and money. Once I opened 30~ crates and the only valuable item costed $55. On the other hand another time I opened 3 crates and a knife valued at $67 dropped. I believe it is a matter of luck but in the end you will end up in loss.