Chris Krauss is a collector from Missouri.  He says that the trays are few and far between in the Midwest, so he spends all his free time and money on eBay.  His collection now numbers over 2000 different trays including riverboats, Indian casinos, Deadwood, and Atlantic City with all the minute variations of color, glass style, etc.  He says his unfinished basement is overflowing with duplicates, which he would love to trade.  He has a website listing his traders which includes a wish list:

Chris Krauss' Trader