marketplacepulse.comWhile the 15% transaction fee has remained constant for more than a decade, it can vary by category and be as low as 8%. Meanwhile, Fulfillment by Amazon (FBA) fees have increased gradually over time, with Amazon introducing yearly increases in fulfillment fees and storage fees. I reached out to a few Amazon sellers and agencies and was asked to keep their information private. Compared to Amazon, Walmart is a more economical choice, particularly for new sellers that can take advantage of transaction fee discounts. As more sellers choose to advertise, the competition for ad space increases, driving up advertising costs.