Our online boutique would like to offer 20% off the purchase of 1 full-priced product when a unique coupon code is entered. Is there a way to do this in Shopify or is there a certain app that would do this? We do NOT want the 20% to apply to all products - only the highest priced product in their cart.
I'm Miles from the Social Care team at Shopify. Thanks for reaching out about your need for a discount feature. At this stage, Shopify's built-in discount feature doesn't offer a way to discount the highest-priced item. You're only able to set conditions around which products or collections are part of the discount, and what the minimum requirements of that discount are. This is something I'm happy to pass onto our team for consideration in future updates on your behalf though.
In the meantime, I've had a look through the Shopify App Store to see if there are any apps that may help you achieve your goal. It looks like some apps offer similar functionality, but not quite. There are some apps that allow you to apply the discount to the lowest priced item in the cart as this is standard practice across the retail industry (i.e. buy 2 or more items and get x% of a product of equal or lesser value). I'd love to understand the thought process behind your current idea of discounting the higher-priced item.
Your best option here is to hire a developer to see if they can custom code a solution for you. I recommend Shopify Experts which is Shopify's marketplace of developers. Here, you'll be able to search and find a Shopify Expert who can help, or post a job request for experts to provide you with a quote for their services. Experts are vetted by Shopify so you'll always find someone who can help you out.
If you have any questions at all, please let me know.