There could be a day or two between the time he sends Bitcoin to the escrow, and the time the product is bought.
If you are used to do this, what's the usual, safe way?
Never ever purchase a thing if the btc arent still being held by the escrow.If you do concern about international shipment then you can always
ask the courier or post office on how much it would be charged for that particular item into a specific destination.They can already give you out
the charges on just giving those details.Then you can total it up and adding up some % for overall charge in btc. Fluctuations in the time of transaction? Deal with it.