I saw comp books at Walmart yesterday for 50 cents. I am not making them this year though. I do plan to make the mini ones though, so need to watch for the 3-packs at Dollar store.
Also, some dry erase pens in packs of 3 for $1, and good prices on post-it notes.
The other good deal I bought was black staples for 50 cents. I like to use these when I staple toppers but don't want to cover the area with more paper.