James,
There was suppose to be another find of a box a couple of months ago. I turned down two offers to buy the box. As it turns out none surfaced at the convention as far as I know. I sold the last one I had about 10 days ago. That was from the box my friend found in the Tropicana in 1981 in which all the chips were new like the box of $5's you found. He still has about 80 from that box, but has no desire to sell them. I do have one chip in addition to the one in my collection that I bought on about three years ago. It was in used condition & I paid $30 for it. It's the only used one I have seen. The gentleman who sold it said he had it for years.

Andy - Las Vegas