what exactly are you trying to repair? I recently fixed up my girls 4 by just watching a few youtube videos, if your "fix it" inclined, its a pretty simple job. I picked up most of the
iphone 4 parts i needed for under 10 buck a peice, but the screen is pretty costly....but i ask whats wrong only becuase when i attempt a at home fix on my SI i refrence the service manual, but i didnt think twice about it as i took apart that iphone...
*Edit....i think my dumbass missed the point! = Jailbreak