Adding items to the shopping basket without completing the purchasing process does not constitute a reservation. The price and availability of the products stored in the basket are subject to changes. You'll find the most recent price of each product in the basket.
Once you have added all the items you want to buy to the basket, the next step will be to process the order as a registered or unregistered user and make the payment. To do so, you must follow the steps of the purchasing process, filling out or verifying the information requested in each step. Additionally, during the purchasing process, you will be able to modify the details of your order before making your payment.