I can get a JL 10 inch sub and a JL amp used for about $225. The car break down is as follows:
Dash: 3" Mid
Door: 1" Tweeter, 3" Mid, 10" Woofer
Rear Side: 3" Mid
Rear Deck: 6x9" Woofer
For $500 bucks for that 2-way system, that will run me over $1K just to replace the door speakers!