What's the deal with these restaurant chips? I see them all over the place lately. These chips are rated L, M and T. But are regularly selling anywhere from $20-$35 on ebay.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2118683547
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2121937344
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2122176051
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2124206998
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2123880174