I have tried tried up multiple times starting back when it first began. At the beginning it wasn't too bad but as time when on the site became more and more how do I say -picky. That's just not the right word. They give you a plastic bag for you to send items in and give you a list of what they except which has become more and more about specific brands then nice great condition clothes. Every time I have sent a bag in of gently used children's clothes I get an email stating they were only able to accept 1 or 2 items out of a bag on 20-30 name brand items and give you only cents for the items.
Last bag sent in had about 30 items some never worn and the "buyout" was $7.00. My latest experience is this- full bag mailed in, 2 months later received an email telling me my bag was unusable as they detected an odor. All the items were freshly washed before placing in the bag and sealing it to mail. The items were in the bag for over 3 months by the time the site opened the bag to process.
This will be the last time I use or buy from Thred Up. It is definitely not worth it. At this point I would rather donate locally or sell to Plato's Closest or Once upon a Child. MUCH better experiences.