as I suspected these are just random figures somebody pulled out of their nose They gave 110 000 for Copernicus 1543 not 1542 as incorrectly stated De revolutionibus If you bought this book at this price you should have it closely examined because you underpaid it by a factor of 20 Either you spent 110k on a cheap fake or you just made a 2 millions profit Either way these numbers need to be sourced or they need to go