[Michlib-l] Bulk book boxes

I remember (years ago?), reading about a website or two that have bulk boxes of books for sale. Can anyone recommend one? For use as prizes & giveaways, so not looking for anything expensive. Thanks! Amber L Hughey, MLIS She/Hers Director Bridgeport Public Library zv041 3399 Williamson Saginaw MI 48601 989-777-6030 ext 4