Many thanks for your answers.

Normaly it is not very clever to post auction links here when you want to bet on them
But I believe that the prices will be much higher than I could afford.
So, here are the seller's auctions:
http://www.ebay.de/sch/xdw8870/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p3686

Regards,
Björn Zabel
R-5585
www.casino-chips.de