seems like you may have the definition of Premium a little off, but in many cases, not finding a product on Ebay (not a good gauge by the way) it means one of two things, either it is a rare object of some sort, which can include physical books, or there simply are not any others selling it, in which case, your niche is wide open for you to make some noise about your product.
Again, without having no bloody idea what you are actually talking about (niche, title, subject, etc) we as advice givers, can only speculate.
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