Simple webshop solution (Craft Commerce)?
You could use https://snipcart.com/, with the product data populated via Craft fields, for an easy/low-cost solution.

No plugin required for this - although https://superbig.co/plugins/snipcart is in the works for an even tighter integration.

For example see https://www.bernatkleinfoundation.org, here's a screenshot of the product entry used to populate products in Snipcart: