I love the data you offer here,,,, I am in the beginning stages of inventorying my collection for insurance and just plain knowing what books I have! Hah! I am getting my wife to put them in a spread sheet for me as I am quite hopeless with a computer compared to her,,,,,,,, I'm a farmer,,,she's in IT,,,,,,,, I have a question for you all,,,,,,, Is a subscription to GPA an inevitable outcome if I am to accurately track the value of my collection? I had a subscription some years ago,,,but I just didn't use it,,,,,,,, after all this counting and cataloging,,,, It seems appropriate. Thank you in advance for your advice!