If you have ever purchased or sold anything on ebay, you know about PayPal. It is a way to pay and be paid for things online. I am much more inclined to use PayPal than to expose my credit cards online. PayPal ties into your bank account and it costs nothing to sign up. They make their money by charging a small fee to the seller.Your purchases are guaranteed just as if you had used a credit card.
What I like best is that you can sign up for a trial as in the $1 trial below and you can click into your PayPal account and cancel the subscription without having to deal with the seller of the product.
If you have any interest in starting an online business, I suggest that you sign up at http://www.paypal.com/