yeah $950 will get you some stuff for the kit but not everything
well used yeah, I am about $400 short of my build and I have spent maybe $600, btw you don't NEED a tranny cooler or wideband and i'm not positive but on a supercharger I don't think you need a boost controller either
good luck finding one for 950, its cost me a third of that just for the supercharger
250 is pushing the max for the internals to carry, you said boost controller not me, and ask MP81 is he is running a trans cooler cause he is a supercharged auto