GetPaid (Formerly the Invoicing plugin) is a lightweight Payments and Invoicing system for WordPress. It can be used to sell anything online via payment forms or buy now buttons that can be added to any landing page. It can also be used by freelancers to manage their Invoices or by 3rd party Themes and Plugins as their payment system. GeoDirectory currently uses GetPaid as its payment system
Would be great to have an option whereby a discount code that is for a percentage discount can be set to apply either only to a single quantity of the most expensive or the cheapest item in the cart/invoice, or to a single quantity of every item in the cart/invoice, rather than apply to all eligible items and entire quantity. That is, if the user is buying item A 3 times in one transaction, the percentage discount can apply only to one quantity of that item, so that if the code is set to be single use or single use per user, the won’t be able to purchase more than 1 quantity of that item on a discounted rate.
Would be great to have an option whereby a discount code that is for a percentage discount can be set to apply either only to a single quantity of the most expensive or the cheapest item in the cart/invoice, or to a single quantity of every item in the cart/invoice, rather than apply to all eligible items and entire quantity. That is, if the user is buying item A 3 times in one transaction, the percentage discount can apply only to one quantity of that item, so that if the code is set to be single use or single use per user, the won’t be able to purchase more than 1 quantity of that item on a discounted rate.
https://wordpress.org/support/topic/feature-request-flexibility-for-how-percentage-discounts-apply-to-1-item/