Signup for a free trial on Amazon Invoicing - We will give you the first 2 weeks processing free of charge. After the two weeks is up you will be able to purchase credits at the prices below
Amazon Invoicing is charged at £24.95(+Vat) per month this also covers first 2495 invoices during that month, additional invoices over 2495 in any one month are charged at £0.01(+Vat) per invoice thereafter.
Credits can be purchased through PayPal online 24 hours a day, when you are logged in, click "CREDITS" to purchase online.