"This just boggles my mind" ... Stu Grant.

"If the seller said that it isn't listed on the Stu Grant website, would that be a problem? Why?

Answer: Because the Stu Grant website is not generally accepted as a standard reference resource.

The implication is that if a chip is unlisted in the catalog (whether mine or James Campiglia's excellent book) ... it must be "rare".

Let me share with you another example Stu, maybe this will also boggle your mind ... and this is not hypothetical ... but an acutual experience I had with a dealer at a recent CC & GTCC Convention.

I saw a chip in his display case that I had never seen before that was quite pricey. I asked if I could borrow the chip to scan for inclusion in the next edition of my catalog and I would acknowledge him as a contributor to the book. The dealer replied, "no, I don't think I want to do that". I asked if I could arrange to have a digital photo taken of the chip at his table. He again said "no".
When I asked what objection does he have to my request, he said that because then the piece would be listed in the catalog and it would not warrant the asking price that he could get if it was NOT listed in my catalog.

With all due respect Stu ..., to answer your question ... I've never visited your website, nor do I know if you even have a website, but I don't believe that your website (real or hypothetical) is considered a standard reference resource.

That's the difference and I think that most knowledgeable chippers would agree.