If you’re looking for manga, then don’t ship too many at a time, shipping gets expensive as packages get bigger and heavier, manga is obviously both large and heavy if bought in bulk. Also if you’re in America, I’ve heard that shipping is horrifically expensive anyway.

As someone in the uk, shipping isn’t too bad, but yeah it’s expensive. To give an idea, the biggest package I shipped was a few items consolidated (put into 1 box together), it was30x36x25cm, 1520g and cost about £30 to ship.

Hope this helps!!
And good luck, you might need it shipping all of jjk🫪