When I was a kid I was furniture shopping with my dad, and I noticed one of the display books that they use to decorate bookshelves and such was actually a book that I had been wanting to read. While my dad walked around the store, I sat on a couch and read a bit of the book. When it was time to leave, I noticed the book actually had a price sticker on there, probably left over from when these stores buy books in bulk. So we took it up to the register and convinced the cashier to let us buy it by ringing up an item that was a similar price. When I got home, I realized that the book had actually been signed by the author too!