In this post, I am going to briefly walk through the process of creating a very simple and basic ecommerce setup using MODx Evolution and PayPal. There are several MODx shopping carts that are at different stages of development and that have different features, however I haven't extensively tested or used any of them, but I hope to eventually do some writeups on them if I get the opportunity to play with them. I would recommend that you definitely explore them too, as well as other third party services that integrate with MODx, such as Ecwid and Foxycart. For this tutorial we're going to do something very simple, basic, and direct with PayPal being the only payment gateway offered. This tutorial is by no means exhaustive or comprehensive, but it should give a good starting point for thinking about how to integrate PayPal with your MODx website for simple sales.