Here's the first non-Valve Steam Machine prototype, care of iBuyPower (update: specs) | Engadget
Sony shows off prototype PS4 headset, charging station - GameSpot
Playstation 3 Slim 120GB, includes 11 games and PS4 Controller (Mint Condition) | eBay
Nintendo PlayStation prototype sells for $360K - CNET
Prototype of the PlayStation 4 - BetaArchive
A Closer Look at the PlayStation 4 Controller Prototype - IGN
These PlayStation 4 controller prototypes may have been forged in the depths of hell - MSPoweruser
Buy Sony PS4 1TB Slim Console Bundled with Spider-Man/Grand Tourist Sport/ Ratchet & Clank (3 Months PlayStation Network Subscription) Online at Best Prices in India - JioMart.
Prototype of the PlayStation 4 - BetaArchive
10 Rarest Consoles In The World - Xfire
These PlayStation 4 controller prototypes may have been forged in the depths of hell - MSPoweruser
PlayStation 4 Controller Image Leaked, Shows Integrated Touchscreen - TechEBlog
Playstation 4 Prototype Controller Close-Up - YouTube
This Is PlayStation 4's (Prototype) Controller - IGN