WordPress Shopping Cart Plugins
1. WordPress Simple PayPal Shopping Cart Plugin
Sell products or services online in one click from your WordPress blog. This plugin also allows you to add the shopping cart anywhere in a post or page or sidebar easily. The shopping cart shows the user what they currently have in the cart and allows them to add or remove items.
2. eShop WordPress shopping cart plugin
An accessible shopping cart plugin for WordPress, packed with various features, including multiple payment gateways.