Once the shopper has enough eligible items in the cart, CartSella discounts the cheapest of them. “Buy 2, the cheapest is free.” No code to enter, the discount appears at checkout. The shopper chooses what goes in the cart, so the reward always lands on the cheapest thing they picked. If you want one specific product given away, use a gift with purchase instead.

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Set one up

1

Create the offer

Offers, then Create offer, then Discounts, then Cheapest-item discount. Two starting templates: Buy 2, cheapest free and Buy 3, discount cheapest (which sets 50%).
2

Name it

Title customers see is the heading on the storefront card and is required. Internal name is private and copies it when left blank.
3

Choose the eligible products

In Eligible products, pick products, variants, collections, vendors or product types. Only these count toward the quantity, and only these can be discounted.
4

Set the quantity rules

Eligibility quantity is how many eligible items unlock the offer, minimum 2. Free items is how many of them are discounted.
5

Decide how much comes off

Discount type and Discount value. 100% makes the item free.
6

Show it and activate

Copy the offer ID into a CartSella — Offers block, set the status to Active, and save.

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Eligible products

The selector mixes collections, products and variants in one selection, and filters by vendor or product type. Tick the exclude option to invert it.
The Eligible products section of a cheapest-item discount with a collection selected
Keep this set wide enough that shoppers can realistically reach the quantity, and narrow enough that the item you end up giving away is one you can afford.

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The quantity rules

The Item discount rules section showing eligibility quantity, free items, discount type and value, the multiply checkbox and the cheapest or most expensive choice
Eligibility quantity defines one set. Free items is how many items inside that set lose their price. Free items is capped at one below the eligibility quantity, so a whole qualifying set can never be free.

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Multiply discounted items

Multiply discounted items decides what happens past one set.
  • On: free items multiply by completed sets. Buy 3 for 1 free, buy 6 for 2 free, buy 9 for 3 free.
  • Off: the shopper gets one set’s worth of discounted items no matter how many they buy.

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Cheapest or most expensive

Discount applies to is normally Cheapest eligible item. Switch it to Most expensive eligible item when you want the promotion to feel generous on a premium range, and price the offer accordingly.

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How much comes off

Discount type and Discount value decide what the selected item ends up costing.
The Buy 3, discount cheapest starting template sets 50% for you. Type and value stay editable afterwards, so a template is a shortcut and never a commitment.

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Product page display

Paste the offer ID into a CartSella — Offers block on your product template. The card renders a carousel of the eligible products with a progress bar, a live prompt line (“Add 2 more to unlock your discount”), variant pickers on each card, and a running total with an Add to cart button, so the shopper can assemble the qualifying set without leaving the page.
The cheapest-item card on a product page: progress bar, product carousel with variant pickers, running total and add to cart button
The Product page display section holds a single Header text field. The storefront card writes its own live prompt line above the products, which changes as the cart fills, so it does not currently render this header. Leave it blank unless you are told otherwise.
Colours, fonts and shared labels such as the Add button wording come from the Customize page. See Theme blocks for placement.

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Advanced

On top of the usual Priority, Maximum uses and Combinations, Advanced options adds one setting for this type: Offer subscribe & save, which shows a subscribe toggle alongside the products so the shopper can turn the same selection into a subscription. See Advanced settings.

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Eligibility

Eligibility and targeting accepts purchase type, traffic source, customers’ order history, customer tags, customer location, markets, cart total, item count and products in cart. Every rule you add has to pass. Full detail in Advanced settings.

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Examples

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Tips

  • It works well for clearance, because the higher-priced items in the set still sell at full price.
  • Two eligible items at very different prices means the shopper is rewarded for adding the cheap one. Group items of similar value if that bothers you.
  • Pair it with the boost popup so shoppers who are one item short get reminded.