This is my all-time favorite site! I'm a bargain shopper, I love going to Goodwill and searching for great clothes. The only problem with Goodwill is that you don't usually find an actual outfit that matches, just random pieces. ThredUP is so easy because it lets you enter search criteria for that exact size and clothing brand, and even color of shirt or pants that you are looking for. You can get some awesome deals buying clothes from them. I've never sold through them though, I've heard you don't make much money so I do all my selling on eBay!