Laravel, the #1 PHP MVC framework, is married with Stripe, the #1 payment processor, and now, supports PayPal payment as well! If online eCommerce services like Squarespace, Etsy. are not extendable for your needs, but a full eCommerce framework such as Magento is typically over-killed, then this is exactly what you are looking for.
Demo https://codecanyon.net/item/yumefave-laravel-ecommerce-online-shop-with-stripe/18008964
Downloadhttps://www.filecad.com/mr1u/Yumefave-v2.3---eCommerce-Online-Shop-with-Stripe-and-PayPal.rar