Looking to build my own Quadcopter, where to start?

[DynaMight]

Hi guys

I'm looking to build my own Quadcopter, rather than buy a RTF. I'm not looking to spend thousands on the greatest stuff but want something thats capable of taking up a GoPro. I currently own a Hubsan X4, so got the bug a little bit from that thing, possible the most expensive £30 I've spent

Just to set a budget, I'm after the cheapest stuff thats half decent. I'm not sure exactly where to start.

Hoping you guys can help me get some decent stuff thats cheap, not some cheap stuff thats crap

I can see you can get most of the stuff from Hobbyking, but what do you recommend?