Some of you may have collected coins--or may still do so. For years and years, the price bible was the Red Book for dealers (to buy at a cheap price) and the Blue Book so that buyers could pay a fully inflated price. They were (and are) both published by the same company/author.
This doesn't even take into account the never- ending subjective grading battles that have plagued coin collectors forever. Is that where we want to head?