I just found 2 web sites you may be interested in:

• epier.com
• ioffer.com (Not really auctions but buy it now with counter offers on the price)

They have a few chip and token auctions but lot's of other "stuff". I thought this one was especially different:
http://www.ioffer.com/viewItem.do?itemID=929181

Keep in mind that I've never used either site, so I'm not making a recommendation. Maybe someone else has some experience with them.
Debby