Black HiSec Keys
Name Change, because you're now CBL Dirty (checked 1 hour ago)
Get a packet of Black Keys, I think it comes in a pack of 7.
Get that pack of 7, and here's the saving strategy.
Buy at least 4 renewal kits, if there's a pack of 5+ that goes under 10,000 NX, then buy it.
Open 1 Black Hisec Case, whatever you get, wait til it expires, if you hate it.
If you like the gun, then renew it as you like.
You get the picture.
don't open 2 black cases unless you really want to.
Buy 3 High Hazard GP cases