Hello 'barbm',
When you buy things in US dollars (just about everything on ebay, haha) and you have a roster of items in your Purchase History, when you click 'Pay Now' on any of them, - do you not have the option to pay for them all at once?
All my same-currency purchases can be paid at once. I also have the option beforehand to remove any of them. So if I buy 6 items, - at checkout they all appear and I pay one total, unless I am, say, waiting for a combined rate adjustment on 2, whereby I remove them for later and just pay 4. Not quite a shopping cart, but better than one-by-one.
Do you not get that?