One of the hazards of cataloguing is to become too interested in your stock. If you take into account the financial value of your time, the value that you add by giving a good description of a book can be totally undermined if are drawn into reading it.
Mike Sims' latest post on his blog concerning 'The Time of my Life - A Frontier Doctor in Alaska' by Harry C. de Vighne is a case in point. At least he has turned a cautionary tale of cataloguing into a review of the book, where none existed amongst the currently available second-hand stock. A gap in the available information has thus been filled but he will never recover the cost and he hasn't the courage to work out his hourly rate even if the book sells immediately!