Well let's see......edition sizes and variations, manufacturing and or creation process information, a bit of history on each light, pictures, a user guide inventory sheet of their own collection, care and collection tips, maybe an access code to a link that would have secondary current prices.....rather than printing it. History of company and the lights. The guide I have from the Rutherfords is pretty full of information. I would pay $25-$50.00. I figured I have thousdands invested, I should want to pay a reasonable amount for the right guide. Sure hope one gets completed.

Good Luck!