[HexsHeroes]

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... and they are wild and unsupported ones at that.
So please take with a grain of salt, and with no intended malice.

1. Someone throwing max bid out there with little interest in following bidding action on lot. A "if I win, great" mentality. A lot of people with lots of deeper pockets out there these days. It is not a 2009-2010 economy anymore.

2. Consignor shill bid, instead of setting a reserve

3. Auction house max bid to acquire item for eventual resale.
Steve V. is a Net54 member, so he might clarify whether Clean Sweep bids in its own auctions to acquire items for CS resale or future auctions. (added: Per Steve, Clean Sweep does not bid within their own auctions for the purpose of acquiring retail stock/inventory). So thought #3 is not relevant.

I am a fan of a Clean Sweep auctions and they have provided me with several autographs I have needed for my collection over the years. I have no problem with auction house bidding when they are transparent in their bidding. If this is a CS max bid, then appears very transparent to me, as a rival bidder.

But 1) and 2) are just as likely valid.