They list the shipping price, and it's that price for ALL of that item...no matter how many you buy. Unless they list it as being cheaper if bought in bulk.
Yeah. If you are curious about bulk shipping, just add that item to your cart and say you want 100 of them or however many. The shipping will NOT be the same as shipping for one item x100. It will be less than that. I've thought of buying some bulk flash drives or something and did this to see what it would be.