I built this one a while back and I was pretty happy with it. My kit came with some LEDs which would have been useful for line-of-sight flying, I didn't mount it because I wanted it for FPV. If you build that be careful, 250 quads are pretty powerful. You will want a bunch of spare props as well.

In addition you'll need a few 3S batteries (1300-1500 mAh), a charger, a radio such as the Turnigy 9X (comes with a receiver). You can get all that for around $100 from hobbyking. Everything else (two-sided tape, zip ties, etc) you can get at a local hardware store, the one thing that you probably want to get online are nylon standoffs for the PDB and the controller (typically stacked on top of each other).