This is kind of a strange question but I've been looking into doing a part time computer repair job to make a bit of extra money to buy a new computer as mine is slowly dying and I desperately need a new one. I have a few different questions but my main question is looking through various other computer repair posts I have seen many people offering clean installs of windows 7 for $40-$50 yet looking online just for a copy of windows 7 it costs $70. How could this possible a lucrative value for computer repair companies? Also, although this is relatively unrelated does age matter when it comes to this sort of thing. I'm only 13... Which obviously indicates a lack of experience but I figure that if I charge less than people would still be willing to go to me rather than my opposition. Is this true?