Here's how to pay with PayPal without opening an account. Click any "add to cart" or "buy it now" and enter your purchase information, as if you were going to buy that item. (you have several steps to go and won't be charged for anything.) You'll come to this screen. (You can click on any of these screen images to see them larger.)
Then you'll come to this screen.
And then this one. It's that easy! Try it.
You are welcome to link to this tutorial but you may not otherwise use this tutorial or these images without my consent.