Paypal payment is the easiest and most accustomed method,
please check the first picture on the right>>
no.1> item price
no.2> "add to cart button" paypal
no.3-4> different options( download, sd-cf card etc)
no.5> "view cart" button paypal.
if you add some other items to you cart, you can check them there.
to buy an item, just add the item to your cart and follow the instructions(second picture):
no.6 for continue shopping
no.7 for paypal check out( if you have paypal account and/or you want to make payment via your paypal account).
no.8 for credit card check out