I went to this link and wrote in with suggestions for sub categories for them to consider. Here's what I sent and here's the link for others to send the request to .
"Hi I am a member of a large group of casino chip collectors who buy and sell in large numbers through e-bay. The problem we are having is with this category http://listings.ebay.com/aw/listings/list/category899/index.html
We are requesting that ebay split this into several sub categories. The biggest problem is that this category always has 4000 to 5000 listings and there is a lot of home poker sets listed. For the collector looking for one or two chips to fill his/her collection it takes a ton of time to search through all the listing. There are several types of chip categories that sellers would like to see. here is a list for consideration.
Obsolete Casino Chips
Current Casino Chips
Limited Edition Chips
State of Nevada Chips
Home Poker Sets
Antique Poker Chips
Jetons and Plaques
I thank you in advance for your consideration with this matter"

http://pages.ebay.com/help/basics/select-support.html
click "suggestions" then click "whats on ebay now" them click " suggestions submissions categories