I know one person that told his mate's he could get computer's fixed cheap charging them and trying to get me to fix them as a favor cheeky b*****d , Once I found out I told him not ask again even for himself. And I built a computer for one of my wife's friends and they bought her a present and I didn't get so much as a thankyou LOL
I know how you feel, i get all sorts to fix for 'friends' i dont mind doing it, but if i dont get at least a thankyou, i dont do it again. Its got to a stage now where i turn more away than i fix now I wouldnt call my mates who are electricians/plumbers etc to give me a hand with something, and NOT thank them (be it some money a couple of drinks whatever), So why does it seem ok to get the 'geek' to fix their comps for sod all
I have built all of mine that are x86/x64 based, don't ask how many, but it's a hell of a lot (20+ years). On this site (And just about any other Tech orientated site), you will get that answer a lot. Joe Public however outnumbers us greatly, so most people will just buy off the shelf.