To purchase products you have 2 choices. You can purchase products on the website by clicking on the "Add to Cart" button associated with the product. This will take you to PayPal where you can use a credit card to make your purchase, increase or decrease the # of items or remove them entirely. You do not have to have a PayPal account to make a purchase. When you checkout your total will be calculated and the appropriate postage will be added to the order.
You may also choose to order by mail by clicking the Mail Orders from the menu on the home page. follow the instructions on this page for sending your order.