I just added Woocommerce to this site. Woocommerce is an e-commerce solution for WordPress websites and it works awesome. By default several payment options are available. It can be used to build an entire online retail space, or just to sell a few products.
It is ideal for selling digital products. Including the service of a woocommerce implementation! So that is why I’ve added the wooccomerce suite to this site, here you can go trough the order system and find out for one dollar how it works.
Oh, and for the Dutch… iDeal payments are possible too!
Update 2022: I wrote a guide with all info you need to get started with WooCommerce and sell your firts product online today!