that a lot of your unknowledgeable eBay sellers that are trying to sell grandpa's chip that he brought home from Vegas in 1955 will list it as a "poker" chip. If you exclude poker from your searches you can miss an occasional, z chip, jewel.

Now a z chip is an exaggeration but I have picked up some nice fractional chips in the past that were listed as a poker chip.

Here is what I do to exclude all of the poker home chips clogging ebay:

-11.5g -11.5 -13.5g -13.5 -gram

That wipes 99% of them, out of my search results.

Cheers!
Bill