Run away. Fast.
If you do send items to them, take pictures of what you sent them, pay extra for the fast processing time, and pay extra for the return assurance. Trust me. Then at least you are only out those fees, when you tell them to return your items to you, after you see the payoff amount. They will cheerfully do so at that point, because they already made a profit on the bag fee, return fee, postage, and return assurance bs.
********* I AM UPDATING/EDITING MY REVIEW because I am still so mad about my recent experience with THREDUP, I contacted them for some clarification. OMG, they are worse than I thought.
Let me explain how it works with them (read the fine print on their website).
You can order a "free" (LOL) cleanout bag, which will be processed in two to three
Months ( don't believe them if they tell you it's faster), and then you will be charged $ 6.99 fee for it once they process your items for a payout. Or pay $ 9.99 for a bag that will be processed quicker.
That $ 10.99 (optional) fee for " return assurance", don't pay it. That only means that IF they don't accept any of your items for whatever reason, they will send them back to you. You pay shipping. Plus the $ 10.99 fee.
Even WITH the $ 10.99 return assurance, if they DO accept your items, and offer you a payout amount, and you don't like the amount, too bad. You can't have your items back. Period.
Also, if they decide that they won't accept an item, and you DIDN'T pay for the return assurance, you not only can't have your item back, they don't even tell you that they didn't accept the item. Its up to you to find out WHAT THE HELL HAPPENED TO THAT ITEM.
Like a very expensive designer dress I sent them in my bag (I didn't pay for return assurance), worn once for just a few hours, not a mark or flaw on it, truly "Like New". No mention of that dress when they contacted me with the measly amount they were giving me for the other like new items in my bag (some of which sold immediately, by the way). Finally after me pushing the issue, they told me, "Oh, that expensive designer dress? Yes, it WAS in your bag, but we didn't even mention it when we sent you your payout email, because there was a STAIN on it, so we gave it away to charity, since you didn't pay extra for return assurance on unaccepted items ". There was NO STAIN on that dress. Period. It was perfect.
The payout I received on my other items? (All LIKE new), $ 6.00. Total. I honestly couldn't believe it. And since I was being charged $ 6.99 for the bag, that means my payout was ZERO. And, I couldn't tell them to shove it and send me my items back (I would have gladly paid return shipping) because the fine print states, once we get your stuff, if its acceptable for us to sell, you either accept the dollar amount we are offering you, or, well, there is no other option.
OMG, run, run, run, away from this company.