Many artists use other services such as Gumroad and Inprnt to sell goods. You can easily link to these services in several ways:
Adding a Menu Item
You can add menu items that link to any external website. Simply go into your Theme Customizer, add the menu item and link to the external site.
Adding a Home Page Image
On certain themes such as Vertical and Horizon, you can add a home page image, with a title and link to any external website.