I am planning on buying a preloved LV purse from a store on Malleries.com. I already got in authenticated, read about their return policy, and the fine print. They say that shipping is free worldwide but customs fees, taxes, etc are the buyers responsibility. They are shipping it from Japan...how do I know what the fees will be? I've never ordered anything from Japan before...and when I add it to my cart, it only shows the amount before taxes. Any suggestions?