This is a very rare problem, it happens to a very small number of people but we’ve never been able to reproduce it in our testing here. It seems to be caused by Paypal’s new settings. Less than 1% of people don’t see a button to pay. If this happens to you, please try leaving the site, then come back and try again. If it still doesn’t work, contact us and we can set the Paypal settings back to the old version until you make your order.