Luxury’s Gray Market Is Emerging From the Shadows

Imagine you are hunting online for a pair of square-toed slides from Bottega Veneta, one of the most-hyped luxury brands of the moment. A new season pair can cost more than $550 from the brand’s website, an old-guard department store like Neiman Marcus or a newer e-commerce player like Net-a-Porter. But what if you chose to buy from Cettire, a website offering discounts of up to 30 percent on the latest fashion styles? You would be a player in the multibillion-dollar luxury “gray” market, a fast-growing sales sector that has…