Fixing iPhone screens for cash?

I'm looking for some suggestions. I'm a 15 year old geek, living in the boonies, in need of some extra cash for spending. I'm considering fixing iPhone screens for around $50 give or take a little. My problem is this: most people aren't going to trust the average 15 year old tearing into their $300 iPhone. I'm the kind of guy that can do it - I'm techy, I've had every computer in the house fully apart for cleaning and back together and they all work better than before. I build robots from Arduino and Lego Mindstorms platforms. So I've thought of having a shop on the internet, such as Ebay or Etsy, but then I'd have to figure in shipping costs and all. The actual repair is fairly straightforward, it's about a 20 minute job, the screen costs $20-$25, and shipping would be roughly $10 round-trip, leaving me with $30 for a 20 minute job. All I'm looking for in this question is ideas for how to get the phones. I.E. Real life, having an internet shop, etc. I'm homeschooled so I have a decent amount of free time, around 4 hours a day including evenings, plus weekends.

Added (1). $20 dollar profit, not $30. Stupid typo. Lol

Added (2). Sorry, I was referring to the 4S model.

IPhones range from $599-899. Not $300

Well… Give it a try? Who wouldnt want their screen fixed for only 50 bucks. I paid 70 for front screen and 20 for back for my 4s

  • Where is the best place to get help for fixing an iPhone 4? I have a friend who brought me his iPhone, and it is literally in pieces. I need a forum style website that is SUPER active with a lot of traffic to help me recover the iPhone I have here. I know there are hundreds of iPhone based forums, which is the best and most active?
  • What are the chances of Apple fixing my iPhone for free under warranty? I'm sending my iPhone 6 in tomorrow because the screen is lifted. All over and it won't pop back into place, I'm able to still fully use the phone that is just a big problem to me
  • Methods for fixing an iPhone five after water damage? Recently I put my phone in water with my lifeproof case, and the case didn't work in water like advertised and now my phone has water damage. It's been in rice for a few days and improvements have shown. At first my phone was completely unresponsive but now it turns on and there's lines. It's been in rice a few days after it began to turn on and nothing else has changed. Is there anything I could do to fix this?
  • Is outofwarranty.com reliable for fixing my broken iphone screen? My cousin had a water damaged phone but it was an samsung android and recommended I use http://www.outofwarranty.com. I have a iphone with a broken screen. Has anyone used them and if so what is there response time.