How do I invoice a buyer for a 2nd item he's agreed to take but only after paying for the 1st

A buyer agreed to take a 2nd item but only after completing the transaction for the 1st item.  How best do I ask for payment for the 2nd item?  I can't see any way of doing this easily?

View Entire Topic

If he Buys the 2nd Item. Before he Pays you can Cancel out the Postage or just Reduce it by Changing the Invoice from Send Payment Details in More Actions. The Drop Down Box next to the Sold Item.