Best budget vive pc possible?

[Betapig]

What is the cheapest pc build that could run the vive at playable levels. The only budget is as cheap as possible. I already have a PSU case and HDD.

 

[Tri23]

Per google first results...

Graphics processor: Nvidia GeForce GTX970, or AMD Radeon R9 290 equivalent or greater.
CPU: Intel i5-4590 or AMD FX 8350 equivalent or greater.
RAM: At least 4GB.
Video output: HDMI 1.4 or DisplayPort 1.2 or newer.
USB port: One USB 2.0 or greater.