Are you the seller? EBay will take payments from your Paypal account for your listing and selling fees.
Are you the buyer? The seller would have to manually send you an invoice for the combined cost of the items and shipping and you would have to personally pay that.
Each seller invoices separately. If you are buying from multiple sellers, they cannot send you one invoice.
Decide if you are the seller or the buyer and try to explain again what is actually happening here.