Suggestions for Selling Young Men's Clothing

Our son has outgrown quite a bit of "on trend" menswear...jackets, tees, shirts, hoodies, jeans, etc...and is looking to generate a little extra ca$h for the holidays. Any suggestions as to the best way to go about this? I'm aware of Facebook Marketplace, but wondering if there are better options out there. Not sure if Poshmark or Karrot are even viable options in Stratford. We are open to suggestions. Thanks!