At the link below are some sold listings in auctions which hopefully will give you an idea. Note: I searched for "King 8" in Collectibles > Casino > Chips > Individual Casino Chips.

https://www.ebay.com/sch/i.html?_from=R40&_nkw=%22King+8%22&_sacat=35743&rt=nc&LH_Sold=1&LH_Complete=1

If I'm not mistaken, the Crystal City, CA chips are popular among set builders. Hope this helps!