Just Kampers has been part of the VW community since 1989, supplying parts and accessories for classic and modern Volkswagen campers. Its catalogue runs from small fittings to long body panels, and many of those larger parts ship with an extra delivery charge.
Just Kampers works with UK eCommerce CRO agency Proof3 on an ongoing experimentation programme, using Mida to test changes across the site.
Oversized items carry an additional delivery fee, but the product page didn't mention it anywhere near the buying controls. Shoppers could add a sill panel to their basket without knowing that the final delivery cost would be higher than they expected.
Proof3's hypothesis was that customers needed to understand product-specific delivery costs before committing to a purchase. A charge that appears late in the journey feels like a surprise, and surprise costs are one of the most common reasons shoppers abandon a basket.
Rather than hide the fee or remove it, Proof3 tested being completely upfront about it. Using Mida's code editor, they added a delivery information panel directly beneath the Add to Basket and express payment buttons on oversized products.
Control: the buying controls give no indication that this item carries an oversize delivery fee. Variant: an "Oversized Item" panel sits right under the buying controls, flags the item as oversized, shows the additional charge and links to more information about large item delivery.
The change didn't alter the price, the delivery policy or the checkout. It simply moved information the customer would discover anyway to the moment they were deciding whether to buy.
Proof3 used Mida to run an A/B test on Just Kampers' product pages for desktop and tablet visitors, comparing the original page against the version with the delivery panel. The test ran for just over five weeks, with add-to-basket rate, purchase conversion and revenue per user as the key metrics.
The variant with upfront delivery messaging was the clear winner, improving every key metric against the control:
Based on these results, the delivery messaging was rolled out to 100% of traffic.
It's tempting to assume that drawing attention to an extra charge would put people off. Here, the opposite happened. Shoppers who understood the full cost before adding to basket were more likely to go on and complete their purchase, because there was nothing left to discover later in checkout.
Clear, honest delivery information also answers a question many customers would otherwise have to go looking for. Removing that uncertainty at the product page made the decision to buy easier, not harder.
Transparency converts. Surfacing product-specific costs at the point of decision builds trust and removes the "surprise fee" moment that drives basket abandonment.
Test the counterintuitive idea. Hiding a cost feels safer, but only a controlled A/B test can show how customers actually react. Proof3 used Mida to validate the change on live traffic before rolling it out to everyone.
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