I guess you do get a fair bit but I just dont like spending money like that all at once when it could go on coilies or summat.
I got a sony head unit 4x52w with ipod/iphone compatibility (controlled from HU too) for £75 in the sale.
My sub as I say was £38 delivered.
My amp was about £20 second hand but in perfect condition.
Front speakers are fli components - they were brand new and about £50.
Wiring kit was about £10
So all in all I've spent less than £200 and the sound is pretty good, good enough for me anyway