I was looking for this picture*, and clicking around I learned that in 2005 John and Bonny Buhler bought Sheila McGraw's illustrations for Love You Forever. The asking price for the complete set of illustrations was $300,000. I had no idea. I wonder what the actual purchase price was.
*http://www.lochgallery.com/images/stories/artwork/l/sheila_mcgraw/sm_04.jpg
*http://www.lochgallery.com/images/stories/artwork/l/sheila_mcgraw/sm_04.jpg