Hi friends I used to process my sales with ClickBank. It wasn't good for me and I waste my earnings with high rates. It also does not checkout my earnings at once. Ok, After one year, I planed to use Paypal for my payment processing. I bought WP e-Store plugin and simply I linked it to my PayPal Merchant account. I have not any problem with Paypal and I highly recommend you to use Paypal for your Payment processing. Now I want to introduce you a plugin which integrates with Paypal in few clicks!. Read my short introduction below: In a Nutshell… this sleek WordPress shopping cart plugin allows you to sell any form of digital products and services from your own wordpress blog securely with complete automation. What I mean by complete automation is that once you set it up the whole process (The buying and the delivering of the product without revealing the real URL of the product) works on its own. Paypal never blocked my account!You can read more features in this link: http://www.tipsandtricks-hq.com/wordpress-estore-plugin-complete-solution-to-sell-digital-products-from-your-wordpress-blog-securely-1059?ap_id=buynow Let me know your opinion about PayPal payment processing. Good Luck Dr.SEO
Seems to be a decent paypal plugin for Wordpress. I use Joomla for most of my sites though and there are several free paypal plugins