So, about an year ago I started taking pictures with my first DSLR, the D3200 kit. But now I feel the need of an upgrade and I though that I could get a prime lens (like the 50mm 1.8) to get better quality image. But I'm also thinking about to buy a used gear like the D90 for a good price and maybe get better features (like more focal points, bracketing, ISO, etc) but I´m not sure if worth it. My budget it's not so high, that's why I'm thinking about this investment, and what could it bring to me. I know the camera it's not the most important piece of the final work. but It would be awesome to have some advice about changing my entry level body to a mid-range but older one.