I used From Japan before, it was pretty good when I used it. I think they split it into 2 charges. Just the item won, service charge,commission, system fee. Then the next one is delivery to them, bank fees, then international shipping, and the system use fee. You have 30 days from when the item reaches them to add more items to combine shipping after that they'll ship it. I think they give you a discount depending how much you in purchase with them in a tiered system. I haven't used them in awhile so I apologize if the info isn't accurate.
I just found this. Hope it helps:
http://www.fromjapan.co.jp/qanda?lang=en#qacid_1