When I was in the hospital my friend lent me her fave book "The Meloncholy Death of Oyster Boy and Other Stories" by Tim Burton, as we're both rabid fans. Her sister got her the book for her bday one year, and she LOVED it.
Anyways, I somehow forgot about it in a plastic bag that had an apple in it, and found it a few months later while cleaning. Oops. The book was destroyed!!!! I looked it up on Chapters to find a new one and they wanted $200 FREAKING DOLLARS for this small little book! I guess it's out of print now and is considered a rare book.
Thankfully I found a couple on Ebay for $15, with $5 shipping. Thank the heavens. Ebay totally saved my butt on that one!