I used snipcart to create my umbraco 13 site - www.beaniefriends.com - it works really well with umbraco, as you can plug into your existing node structure for products. You simply decorate a “BUY” button with some data-attrs and thats it
It might be worth checking out our product, uSkinned Site Builder for Umbraco. We’ve got a comprehensive integration with Snipcart out of the box, meaning you can get up and running with Umbraco & Snipcart in minutes.