I got my Nikon D3100 a year ago. Not really thinking, or researching, it was kind of a rash decision.
  Well, I've invested into a lot of AF lens. Being that the Nikon D3100 doesn't have the focusing motor built in, it's becoming a pain in the ***. I don't want to keep spending $300 per lens. I'm a college student, don't really have the money to keep blowing on the newer, more expensive lens right now.
  
  I was wondering, should I keep my D3100 or trade it for a D70 or D50? Will that be a bad trade in your eyes? I do photography of course and I'm currently whipping together a home based studio.
  
  What do you guys think? 
  Read more: Should I trade my Nikon d3100 for D50/70?