If you are looking for an easy way to turn your nation into an online store, give Ecwid a try and you could be up and running in just minutes. 

Ecwid is a shopping cart software startup providing a cross-platform, AJAX-powered store builder widget that enables users to easily embed a store into any website and social network page. The service is free to shops with fewer than 100 products, and monthly plans for bigger stores start at $17. You can take payments through major vendors including PayPal, Google Checkout and Authorize.net.  

Embedding their widget into NationBuilder is a 5-minute endeavour.

Embedding the Ecwid Product Browser widget

1. After signing up on their website, find the Dashboard and copy the "Product Browser Widget Code." This snippet will be what pulls up your products on the HTML page. 

 2. Create a new Page for your shop under the "Basic" html type.

 3. Under your new page settings, click on Template and search for  - you can paste your snippet code right beneath it.

Save & you're done!

You can now customize your store on Ecwid and changes will be reflected instantly in your nation. There are also a few other widgets available, including a handy drag & drop shopping bag that could be added to your custom sidebar.