worst used book experience

[ajs1976]

What is your worst experience when purchasing a used text book? I have gotten books that were heavily highlighted and/or had a lot of notes written in them, but for the most part nothing major until I purchased the book for capstone. Physically the book was in great shape, but its previous owner most have been a heavy smoker. It smells so bad. It is a little better after I let it air out for a week and I try to leave it opened.