Vince Mowery created a pretty comprehensive token catalog of Nevada tokens he himself got from the casinos when they were new. It's pretty old now and long out of print but does give an idea of what the relative prices were. His daughter, Wendy Schultz has his inventory and has a table at most of the Las Vegas chips shows.

http://www.nytimes.com/2008/06/22/us/22chips.html?_r=0

Janice O'Neal did one of the most complete listings of Nevada dollar tokens with catalog numbers. It did not suggest values but still a valuable reference. Janice passed away a number of years ago butI think Dan Wickett can still reproduce copies of it.

http://www.casino-tokens.com/Reference.htm

There are a few other token references on this link. Again, tokens have always been a pretty il-liquid collectible but knowing what's out there is the first step. Well-used tokens are pretty hard to find a buyer for.