E-Commerce PayPal

Hopefully this is not repetitive, but here is my dilemma.

I'm using PayPal as my payment gateway, and have the PayPal IPN configured. I add an item to my cart, checkout and pay for item on paypal (sandbox). After item is paid for, user gets redirected accordingly but noticed that the Payment is always set to Payment status of Pending, while the workflow is always set to received.

I don't want to use a cart. How do I setup eC to allow my users to click a Buy Now button that will immediately take the customer to PayPal?