Hey Jill -

You don't need to buy a catalog just to check some stuff out. The CCGTCC maintains a library that you can use. They have these in there.

Nevada Nevada Silver Premium Gaming Tokens/1997 Price Guide Weaver, Marvin 1997/3rd Ed. Book (spiral) 1
Nevada Nevada Silver Premium Gaming Tokens/1999 Price Guide Weaver, Marvin 1999/4th Ed. Book (spiral) 2