Postage and shipping
Shipping is always free within Europe and USA and most other countries. You can order as many items as you like. If an item is backordered it will be delivered somewhat later than the rest of the shipment.
Credit Card Payment
It is possible to pay using credit card as VISA or Mastercard. In order to pay using credit card your browser must be able to accept third-part cookies.
Paypal is a perfect option to pay your order, simply follow the steps advised on paypal's pages.