Using PayPal with Pub Site
You can easily add ecommerce to a Pub Site website. Go to the ecommerce tab and uncheck the first checkbox:
Then you need to have a payment processor. The easiest one to set up with Pub Site is PayPal. You need what they call a business account that can accept credit cards.
There are two types, the Standard free account and the Pro paid account. The difference is that with the Pro account the entire transaction takes place on your website, whereas with the Standard the customer is taken to the PayPal website to complete the purchase. In both cases customers can pay using PayPal or by credit card.
To set up, select Accept Credit Cards from the from the Checkout submenu:
In the Payment Gateway drop-down, choose your account type, Payments Pro or Standard (Free).
In your PayPal account, click on Account Settings (in the drop-down menu under your name at the top right). You will be taken to the Account Access page. Click on "Update" to the right of API Access. Then scroll down to NVP/SOAP API integration (Classic) and click on "Manage API credentials."
Your API credentials will include a Username, API Password, and a Signature which will be a long alphanumeric string.
Click Save Settings.