Jeremy,
I posted a web site a day or so ago on another Monaco inquiry. See the link inside this BB thread below. I don't know where you find the values of these Monaco chips. I wonder if there are a gazillion of them out there. I have the 500 fr piece shown here, which I want to keep but, really don't know it's supposed value.

http://www.thechipboard.com/index.cgi/page/1/md/read/id/1072916/sbj/chip-i-d-help-monaco-chips/