Once upon a time, if you wanted to buy a luxury brand item secondhand (say, a Chanel handbag) you had to have an in. There was no easy way to find one. But over the past decade, the market for secondhand luxury goods has exploded. There are now many online resellers where you can shop for used and discounted luxury items. One big problem — how can you be sure if it’s real and authentic? Some online resellers claim to have solved this problem. They say they’ve developed a process of authentication, and so buyers can trust that the bag is really Gucci or Cartier or Hermès or whatever. But according to some luxury brands, authenticity is something that is often imitated but never replicated. In today’s episode of Planet Money, the fight between Chanel and The RealReal. And how luxury brands are reacting to the enormous and growing secondhand market for luxury goods. Support: * Planet Money+ [https://n.pr/3HlREPz] Read:  * Our book: Planet Money: A Guide to the Economic Forces That Shape Your Life [https://lnk.to/i3AukBdD] * Our weekly longform Planet Money newsletter [https://n.pr/3zrFvUB] * Our weekly Indicator round-up newsletter [https://www.npr.org/newsletter/indicator] Follow:  * Instagram [https://n.pr/3FqLuws] * TikTok [https://n.pr/3sGZdrq] * YouTube [https://lnk.to/iCVDaW3C] * Facebook [https://n.pr/3h92GwS] This episode of Planet Money was hosted by Amanda Aronczyk and Jeff Guo. It was produced by James Sneed with help from Charlotte Isidore, who also fact checked this episode. Jess Jiang edited the show and it was engineered by Cena Loffredo. Alex Goldmark is Planet Money's executive producer. See pcm.adswizz.com [https://pcm.adswizz.com] for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy [https://www.npr.org/about-npr/179878450/privacy-policy]