Do you have a big fan follow to your blogs, articles or websites. They are your potential buyers. why not exploit this opportunity?
You can put together some of your best blogs and offer this to your readers in your blog. Do similar from your articles or websites.
Accept credit card payment right from your blogs/articles using Google Checkout
or Paypal and automatically deliver the item from a secure link.
I am offering a software that will automate this whole process free of charge. All you need to do is add some html code in your blog.