tracy dinunzio is the founder. first of you wiall you came up this idea because you had stuff in your closet you wanted to get rid of. >> the average woman only wore 20% of their closets last year. >> explain how tradesy works. >> it is marketplace, online only. a websitd a an app where women can buy and sell anything from their closets. >> before we even booked you or mentioned you around here i used the site. because my daughter wanted a coach bag and there was no way i was paying for a brand new coach bag for a 12-year-old. so explain, i will say i was very intrigued. you drew me in. the one thing i was nervous about was is it reel? how do i know it's not counterfeit. >> that's uniwione thing we do difficultly. if you ever receive anything from us that isn't authentic you get all your money back and a big apology. but we authenticate using technology. >> how? looking at the pictures people take and post online. >> you can't authentic ate products but you can authenticate people. >> so if you get a good track rec