This may or may not be an actual case of shill bidding, but, to me, this shows a textbook pattern of shill bidding.

If I wanted to defraud bidders by shill-bidding on my own auctions, I would do a couple of things.

1. Have a friend bid on my auctions up to a price I specify. If I didn't care to disguise these shenanegans, I would not mention that my friend should bid on the auctions of others. Therefore if a search was done on my friend's auctions it would only reveal that he bid on my auctions.

2. Have my friend bid up to a level close to the level at which I want to sell the chip. Of course this stratgey will result in my friend winning some of my auctions. This strategy might also result in him pushing a bid way past the level at which the auction would have honestly ended ( I might even make an extra $67 on an auction).

Both of the above have occurred in the auctions in question. Is this shill bidding? Maybe, maybe not. There is, however, a definite odor.