One issue I seem to get with a lot of buyers, as I do refer them to my shops here, is that they want to buy more than 1 item. I do put on each listing to wait to make payment, but most times they click pay now. That increases the Postage by double all the time. Instead of having 1 buy button how about a basket, where people can then click on checkout once finished buying and then as a seller I can then combine postage.