I have spoken to ebay about this and was told it would be passed on to the relevant dept.
But so far nothing has been done.
When you list an item for international postage and "accidentally" select "Flat cost to all buyers"
then leave the cost field blank you end up having the item listed for Free postage internationally.
There is no error message to warn you that the field is blank and international buyers see Free postage when looking at the listing.
I know it is a careless error buy surely it is also a fault with ebay.
Please fix.
