You can find how much you need to pay for your item:
After you win an item, the Pay Now button is usually the fastest way to pay your seller. The Pay Now button will appear in the listing after you win an item, in My eBay, and in the confirmation email that you receive from eBay.
When you click the Pay Now button, most of the time your payment details will be automatically calculated for you. These details will match the postage and handling, tax (if applicable), and multiple purchase discounts that can be found in the listing below the item description.