It was about $1100, the video card was the only crazy expensive thing. I ordered everything through Amazon Prime so all the shipping was free and Amazon is actually cheaper than Tiger Direct and New Egg.
I already had a monitor, mouse, and keyboard.
Took about an hour to build, but I'm pretty knowledgeable. Your best bet would be get a recent youtube video, search like "2015 gamer pc build" or something like that and they'll walk you right through it. The only tricky part is putting all the little jumper cables in the right spot.