Question - What is the best way to ship Criterion blu-rays?

Just got accepted to grad school so I need to downsize my collection (tragic, I know) to set some extra money aside. I'm thinking about selling approximately 20%-40% of my collection, which is between 40-80 movies. Included in these are medium boxed sets like Eclipse series and larger boxed sets like Jacque Demy and Dietrich & Sternberg.

I appreciate all the advice.

EDIT - Here's a list of movies I'm selling: https://www.reddit.com/r/criterion/comments/amljek/monthly_marketplace_for_sales_and_trades_february/eh6thkh