how much could I get for my bose headunit 2 tweeters 4 round 6.5 inch speakers and the 8 inch sub and the amp

 

Not very much IMO.........

(1) If you were to order it from the dealership brand new...its pricey
(2) For the same amount of money, you could do way better
(3) Its a little around the way to customize around the system
(4) Theres an audio Forum for this..