Having struggled over the years as a Miva Shopping Cart affiliate and then switched to the open-source alternative osCommerce, I am pleased to say that there are many good solutions for installing a shopping cart in the WordPress CMS. I will be expanding this Page but for now, I am listing my tested favorites:

WP e-Commerce

A free plugin application with inexpensive enhancement modules.

Ecwid Shopping Cart

Free start up version for up to 100 products, then $17/month for an upgrade.

Here’s a quick link that will take you directly to the PayPal Business Account registration area, which can be a little tedious to find…