I think you will buy an item from Amazon so why you are not taking the item directly to you? If you take directly then you would be able to save shipping fee and escrow fee. If the seller can't send directly to you then you should mention the supported country by the seller so that you can target escrow base on the location.
Excellent solution. This did not hit my mind hehe
I am now wondering what is wrong with asking the seller to post it directly in Vietnam?