Head Unit 100-200 bucks
box 60-80 bucks
wire kit 40-75 bucks
subs 80 to 125 bucks a pair
amp 150-200 bucks
if you are really low on cash i wouldn't recomend getting new speakers.. ya prob don't need them anyhow
so you are looking at..anywhere from 400 to 600 bucks for some cheap but "ok" shiz..
you can get mtx4000 series subs for cheap ass.. and for as cheap as they are.. they sound pretty good for 40 bucks each..(10" subs) i think the 12 cost 50 or something..
my neighbor has them and i can always hear that fool coming down the street
Peace