Scouring this site, Ebay, and craigslist has gotten me the system in my sig for $1005. That's wiring, amps, deck, comps, sub, enclosure, battery terminals, fuses,... Everything. The hu was a gift, but I included the price it was found for on Ebay.
Old system well over a grand. Current system about 400 bucks. I drop money here and there into it as I can. It's hard being married with 2 out of 4 kids still in the house. Usually Craigslist is my friend for subs and amps. Last box I got cheap from Dustin aka pro-rabbit as it was a demo box he built and used for a couple hours. That's the kind of deals I look for. And Craigslist I wait till I see something on there a while and I know the person is probably either desperate or sick of looking at the stuff. Then I lowball the shit out of em! LOL!