>Would Walmart take a lower fee? No, it would be the same as Amazon.
Walmart charges less in two ways:
* No monthly membership fee.
* Seemingly random fee discounts, up to and including 0%. More than once I've sold an item early in a day, then sold it again later that day with a different fee percentage.
>Would Walmart give back its fee if the customer sent the product back for a refund?
When Walmart refunds a customer, it takes from the seller's reserves exactly what was paid for the sale in the first place. No more, no less. It is Amazon that charges sellers a "refund processing fee".
While Walmart definitely has its issues, there are also many virtues vis-a-vis Amazon. It is worthwhile selling on both. My 2025 Amazon and Walmart sales are equal.