Credit:
The iPad prototype on sale looks authentic, and is unique in several aspects. It has two full functional dock connectors, one on the bottom side and one on the left side of the device. Furthermore, it sports a special Apple diagnostic software suite called the SwitchBoard.
Unfortunately for wannabe buyers, the device shows quite a bit wear and tear, and the touch screen is not working -- quite a big issue on a tablet.
Still, it could be an interesting buy for a collector or a developer/engineer interested in Apple's secrets.