Variable Quantity is an add-on for the Payment Button for PayPal WordPress plugin (also known as WP PayPal or WordPress PayPal) that can be used to add a quantity field to your PayPal Payments Standard Buy buttons.
PayPal
How to Configure Product Variations in WP PayPal
Product Variations is an add-on for the Payment Button for PayPal WordPress plugin (also known as WP PayPal or WordPress PayPal) that can be used to add variations to your PayPal buttons.
How to Create a PayPal Subscription Button in WordPress
In my PayPal Button plugin there are certain shortcode parameters that you can use to create a PayPal subscription button and accept recurring payments from your WordPress site.
Applying Discount to a PayPal Buy Button in WordPress
Buy Now Discount is an add-on for the Payment Button for PayPal WordPress plugin (also known as WP PayPal) that allows you to add automatic discount functionality to a PayPal Buy Now button. When this is installed, you can apply a flat discount amount, multiple discount amounts, discount percentage and buy one, get one free discount.
Payment Button for PayPal WordPress Plugin
Payment Button for PayPal (also known as WP PayPal) plugin connects PayPal to your WordPress site and makes e-commerce available for you.