Jtags are over priced. Recently a new exploit has been found called RGH (Reset Glitch Hack) you can buy one of these consoles on the market place, or on other websites (Google).
As far as I know only place to buy pre hacked consoles are forums like ttg (don't ever use ttg btw) and here (se7ensins) but I swear that we here at 7s have the most trusted members especially buy sell trade wise.