I use this site to buy awesome, new looking clothes at discounted prices. I have found so many wonderful things from shoes, to dresses, to pants. Now I feel confident that I always have something to wear, pieces that compliment each other and fit me well. My wardrobe needed a major overhaul and thanks to thredUP I did it at a fraction of a price.
If there were ever an issue (late shipping, refund credit late, etc) they are QUICK to remedy the situation and I am pleased in the end. I've had shipping times range from 2-14 days time, but they've always arrived and I can usually bank on a week on average for shipping.
I have used them to sell only when I've tried eBay myself and just want to get the items out of my storage for good. People, if you want to make $$ for your clothes, then use eBay or a yard sale. They are upfront with what they are paying out for clothes - you can look it up on their clothesline page. This should not be a shock to anyone if you did your research. If you want something back (they say they usually decline 50% of a polka dot bag), then use the reassurance shipping method. I also don't understand what all the bad reviews are about. I feel everything is there for you to read.