While there is no dispute as to the origin of the chip, it is interesting to note that the seller has well over 1000 transactions with a 100% positive rating and is in excess of 6 years as a ebay seller.

In addition, scrolling down through the completed transactions, you might note that several well known chip board contributors have done business with him both butyng and selling.
Put that all together and it just doesn't seem to add up.