See details in this post:
http://www.thechipboard.com/index.cgi/page/1/md/read/id/1134260/sbj/ex-auc-charity-fundraiser-auctions-sales-ex/

Auction #2 is for two different rare Wynn prototype chips as described here:
http://www.thechipboard.com/index.cgi/page/1/md/read/id/1112507/sbj/fs-rare-wynn-prototype-chips-fs/
Bidding starts at $50
There is a Buy it Now price of $125
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