Thanks to The Abundance Theme’s use of custom fields, you can quickly add your PayPal payment buttons to any or all of your pages when building your sites. DownLoadGuard buttons also work with the theme, and although DLG comes at a price, it’s infinitely more secure and convenient than using basic PayPal buttons.
Using custom fields is a great way not only to quickly offer a digital product for sale, but to build entire sites which offer them. While the payment buttons will show up at the bottom of each post where used, the price field shows up not just at the bottom of the post, but automatically at the end of the excerpt on the home page, as well as at the end of search and category archive excerpts. Yet if any editing of the price is necessary, you’ll only need to do it in one spot. You can also put your payment buttons and prices at the bottom of pages instead of posts. When done this way, prices will not show up on the home page or anywhere else.
Obviously the theme won’t create zip folders and Thank You pages for you, but it makes creating product and ‘catalog’ pages fast and easy, whether your site sells only one digital product or is completely devoted to them.
The theme makes no claims towards being a complete e-commerce solution (it isn’t), but makes it a breeze to offer digital products from a WordPress site in combination with PayPal, or systems such as DownLoadGuard or WHMCS.

Sites selling PLR, software, web graphics or even entire websites are possible, the only limit being your hosting’s disc space and bandwidth allocation.
If you’d rather just offer free downloads, to build your e-mail list perhaps, custom fields built into the theme allow you to do this quickly too. Again, you can do this on as many or as few of your posts as you like.