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 click Save Settings:
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, go to the Ecommerce tab and 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):
Then, click on the link at the bottom that says "Get your PayPal credentials here" (https://www.paypal.com/businessprofile/mytools/apiaccess/firstparty/signature) and you'll be taken to the PayPal website where you will can click on "Show" and copy your API Username, API Password, and Signature (these are NOT the same as your PayPal login):
Click Save Settings.