: While not a direct bulk seller, it is the best platform to compare prices across 30+ vendors if you are buying specific titles in quantity.

: Best for large-scale operations. They offer curated gaylords (roughly 800–1,000 lbs or 800 books per box) by category, such as children's, fiction, or YA. Note that they typically require a 10-gaylord minimum (approx. 8,000 books).

: Use tools like Book Sale Finder to find massive annual or semi-annual library sales. Many offer "bag sales" or "box sales" on the final day where you can fill a container for a flat fee (e.g., $5).

: "Goodwill Bins" (Goodwill Outlet) often sell books by the pound or at extremely low flat rates (e.g., 10 books for $1).

: Offers "Gaylord boxes" of clean, non-library books for approximately $650 per box, often focusing on non-fiction, humanities, and technology.

and Alibris : Excellent for sourcing multiple copies of specific out-of-print or bargain titles from various independent sellers. Where to buy used books in bulk? - Facebook