Spray primer recommendations?

Hey everyone, I need a spray primer to prime my new army! What cheaper primer spray is worth a try? I've heard some good things about Krylon.

I just get rustoleum flat black primer form bunnings. $8 and does your whole army. basically get the cheapest thing that isn't really trashy.

For me it depends if its colored or White/black, for white/black i use the dollar store brand, for colors i use Rustoleum.