When I get tired of stuff in my closet, I list it on Grailed, Poshmark, and ebay. Majority of my sales happen on eBay and I believe it’s because it the largest marketplace especially when you include global shipping. Poshmark takes about 20% on each sale, eBay takes about 14%, and Grailed is a little less than that (can’t remember exact amount because it’s been so long since I’ve sold on there). For every listing, 8 out of 10 times it’ll sell on eBay and 1 to 2 times out of the 10 its Poshmark or Grailed. Poshmark is super slow on the funds when you sell something because you gotta wait for the buyer to accept the shipment/order first. ebay is the quickest as once the buyer pays, the funds are instantly in your eBay account to spend on eBay or transferrable to your bank in about 2 days. For each platform, I always list Buy It Now with Make An Offer option and free shipping. I factor in the seller fee percentage and shipping costs into the listing price. Hope this helps you.