" 

 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.   "