I will start off saying I have never purchased anything from thredUP. But I likely never will. As a reseller I have noticed their descriptions can be incomplete or just completely wrong. I've sent things where they have put the wrong brand and size in the descriptions. They also don't take many pictures of items so you don't know what you're really getting. It's a very lazy way of listing items in my opinion. If you are trying to make a few bucks don't count on it. Even if they didn't take 90% of your profit people buying the items are not going to pay the listed prices for how thredUP describes and portrays items. You never really know what you're getting.
As mentioned above they take A LOT of your profit. Unless you have Louis Vuitton or Gucci you literally get pennies for your items. And you can sell LV or Gucci (and the like) for much much more on other sites and retain more profit on them. ThredUP is not great for high end brands. You get more of the profit but the sale price is often much lower than it could be elsewhere.
And they have been taking months to process clean out bags. They are blaming covid19 but I have not had this experience with anyone else during this time. ThredUP went from taking a few weeks to 5-6 MONTHS. It will do no good to list summer clothes in October.
I asked to get my bags back but they said they had to process them anyway. That makes no sense.
Sellers beware. You will NOT be happy with this service.