Why Does This Happen?
When you create a collection bundle, MOD Bundles creates a Shopify product set to $0.00. The actual bundle price is calculated dynamically based on the customer's selections and any discount you've configured.
Some themes include built-in logic that:
Hides products with a $0 price from collections and search
Prevents customers from navigating to a $0 product page
Displays a "sold out" or "unavailable" label on free products
Removes the "Add to Cart" button for $0 products
How to Fix It
Option 1: Set a Placeholder Price (Recommended)
Go to Products in your Shopify admin
Find the collection bundle product
Set the Price to a small amount like $0.01 or the expected bundle price
Click Save
This satisfies the theme's price check. The actual price shown to customers on the bundle page is always calculated dynamically by the app, so the placeholder price in the product admin won't affect what customers pay at checkout.
Option 2: Edit Your Theme's Price Logic
If you're comfortable editing theme code (or can ask your developer):
Go to Online Store → Themes → Edit code
Look for template files that check product price (commonly
product-card.liquid,product-grid-item.liquid, or similar)Find conditions like
if product.price > 0orunless product.price == 0Adjust them to allow $0 products
Note: Theme code edits vary by theme. If you're unsure, contact your theme developer or reach out to us for guidance.
Option 3: Check Theme Settings
Some themes have a built-in setting to show or hide free products:
Go to Online Store → Themes → Customize
Look in Theme settings → Products or Collection page settings
Look for options like "Hide free products" or "Hide sold out products"
Disable any setting that hides $0 products
How to Tell If This Is Your Issue
Your collection bundle product page returns a 404 or redirects away
The bundle product doesn't appear in collections even though it's Active
Customers report they can't open the bundle link
The product card shows "Sold out" despite the bundle being active