"A Stardust security guard brought a bunch of them into the 4Q's to sell. He said they had 100's of them."

"If there were hundreds of them, I'd think they'd be in one of the guides...?"

The guard said "He had 100's"
I only saw maybe a dozen that he had with him that day.

As far as the guide books goes:
Authors can only publish what they know about.
I think they do a remarkable job, but they can not ever know about all chips and all especially all hoards.