When you would like to buy several BIN (Buy It Now) items from the same Seller on eBay and pay for your purchase with one payment the procedure is simple. BIN your first item as you normally would and when you get to the screen where you would normally pay there is a clickable to Pay or "continue shopping". You want to continue shopping. You will be able to BIN more items as many times as you would like. When you are finished shopping, on your last BIN you will have the opportunity to choose a clickable "ask seller for total" for an invoice or click the "PAY" button that will complete your transaction. If you choose "ask seller for total" you will receive an invoice with all your purchases and updated shipping charges. Some sellers have sophisticated software that will give you accurate item and shipping totals so that there is no need to ask for the total. Also you will want to read the Seller's item description as some do not give combined shipping discounts and some refund after you have paid.