I think collectors AND dealers have a vested interest in price guides remaining vague! A case in point would be say the hammered coinage! It wouldn't be too hard for a price guide like Spink's to add footnotes to each number. Example: the 6th issue sixpence of E1 covers 18 years and 10 mintmarks and, as we have recently seen, a 1599, AND other dates/mintmarks beside, can fetch some silly money compared to their kin classified within the same Spink number! If a numerical grade was possible (which it isn't IMHO) and a catalogue was in existence that said S2578 F65 VF240 with footnote 1599 Anchor X multiples thereof, etc. etc., where would the experience and knowledge of those who have discovered this information through many hours and great endeavour, stand? How could say someone like me progress through a particular series and discover the rarities and hard dates, and still manage to acquire them through wit and knowledge (when fortune favours), if joe down the road can tell me the rarity of any given date for the Elizabeth series, and put pressure on the market for them? It must be the same for every specialist interest anywhere! If you remove the incentive to become expert in a field, by replacing them with a finite catalogue, with it would go the opportunity to afford that which interests the expert and true collector in the first place. Edit: just read your posts mhcoins...welcome aboard!