TL/DR: Have Amazon handle this for you, they are awesome at customer service.
They are. We once purchased a PS3 controller from Amazon Marketplace. It turned out to be a counterfeit, but we didn't notice until 3/4 year later when Sony disabled many counterfeit controllers. We contacted Amazon to warn about this seller. They didn't only remove the seller from Marketplace, they also gave us a full refund.
They are. We once purchased a PS3 controller from Amazon Marketplace. It turned out to be a counterfeit, but we didn't notice until 3/4 year later when Sony disabled many counterfeit controllers. We contacted Amazon to warn about this seller. They didn't only remove the seller from Marketplace, they also gave us a full refund.