You can get that from Shopify for WordPress at just $5 per month . If you are looking for a buy button with an admin interface that allows you to manage orders, purchases, sales, and payments, it is a good choice. They have tutorials on how to set up the buy button on your WP site.
With Shopify Lite, you can create custom storefronts and sponsored content on any page or post on your site. Using the Buy Button and Shopify Lite extension,
Plus, you can sell on Facebook. You can sync your two stores. You can manage doctor database your inventory, marketing, analytics, channels, and products from the Shopify admin.
Along with the button, you also get a built-in dashboard with tools that allow you to manage inventory and payments. As for payments, you can use card/e-payments or send an invoice. To process it, use one of the payment processors (Stripe, PayPal, or Square) offered by Shopify or use Shopify Payments.
Shopify Payments isn't bad and can be more cost effective. Without Shopify Payments, you pay a 2% transaction fee plus whatever your processor also charges. On the other hand, Shopify Payments charges 2.9% plus $0.30.
If you don't understand Javascript, HTML, and CSS, you'll have trouble customizing the button and the way products are displayed on your site. This is because you'll need to embed code into your site for it to work. When doing so, you may want to edit the default look.
E-commerce product catalog
Ecommerce Product Catalog is a free WordPress eCommerce plugin designed for B2B, because it can allow people to request quotes.
You can use it to create a product catalog with or without pricing information. Even if you choose to include pricing data, you don't have to connect a payment gateway. I like that you have the freedom to use it as a product catalog or a store.
You can use the WordPress Customizer, template files, and CSS to completely customize your product display.
It is compatible with many free and premium plugins and WordPress themes. You can also add unlimited products with variable product options.
