Compared to many lenses, a prime f-1.8, 50mm prime lens is relatively inexpensive.

But there’s another consideration if you have cropped sensor camera, such as the Nikon DX3200, consider if you’re happy with your current camera.  Some lenses will work on both cropped and full-framed cameras; but some that work with a cropped sensor camera will not work on a full-frame model. Lenses that work on cropped sensor cameras are less expensive, but may not be a good buy if you’re thinking of making an upgrade to a full-frame model in the near future.