Spotted on eBay by 9to5Mac is a rare iPhone 4 prototype that's running Apple's Switchboard testing software. The device looks just like an iPhone 4 with a few modifications. Noticeably absent are the two screws at the bottom of the device, the +/- on the volume buttons and the Apple logo. There's also a screw on the side by the SIM tray that holds the back onto the device.

It's codenamed N90AP and is a fully functional device. The auction has one bid for US$4500 and a Buy It Now price of $10,000. You can check out the device on eBay and get a full tour of it in the video below.

[Via 9to5Mac and Engadget]