Molly,
I've bought from these people before. Less than fifty cents a piece with free shipping. They frequently have misprints for around 25 cents each. Misprint like the ink is blurred, or large egg carton that reads medium, etc. They get your cartons out to you fast!
http://www.eggcartonstore.com/Egg-Cartons-s/3.htm
I also had another source years ago when I was raising crickets and was buying egg flats. They were even cheaper, but for the life of me I can't remember their name.
Thanks Deb
