The WordPress E-Commerce plugin is a powerful e-commerce/shopping cart plugin that works well and is easy to use. It’s not as full-featured as something like Magento or Zen Cart, but it is a plugin for WordPress and that there is enough to at least give it a try. In this screencast, I walk through adding new products and adding images. Click image to left to view video.
WordPress Tutorial: Adding Images in WP E-CommerceBradley Charbonneau