
Prototype Apple products have been known to appear on eBay. Late last year, a prototype MacBook Air was found by a member of our forum and in March a prototype iPhone was spotted.
A prototype Mac Pro has recently been put up for sale on eBay, claiming to be an early 2.4GHz dual Quad-Core processor machine. The machine is said to even be able to run Snow Leopard. Photos of the machine are provided and it does contain a red motherboard typical of Apple's prototype machines:


Meanwhile, another interesting prototype machine was found by a forum member back in May. jpo287 purchased a PowerBook that carries an Intel processor and an iSight camera -- features that were never released in a "PowerBook" branded machine. The machine carries a build date of November of 2005 which was two months before the first Intel MacBook Pros were released. For whatever reason, this unreleased PowerBook contains a blue motherboard:

More photos and speculation can be seen in the original discussion thread.
Article Link: Prototype Mac Pro and Intel PowerBook Spotted